An automatic drainer for low-pressure and medium-to-high-pressure gas systems

Abstract

This utility model belongs to the technical field of mixed gas-liquid fluid equipment in the industrial automation industry, and provides an automatic drainer for low-pressure and medium-to-high-pressure gas systems. It includes an upper valve body, a middle valve body, a lower valve body, a piston, an elastic reset component, a valve core, and a connecting component. During the sliding process of the piston relative to the upper valve body, the first valve core can block the connection between the upper cavity and the middle cavity, and the second valve core can block the connection between the middle cavity and the lower cavity. Compared with traditional electronic timed discharge devices or discharge devices composed of liquid level sensors, this application has a reasonable structural design, reduces the number of electronic sensors, has a small overall size, automatically detects liquid level and automatically discharges, achieving a function of discharging liquid without venting air. At the same time, the control method is simple, requiring no circuit control wiring, making the product safer to use, with a longer lifespan and lower operating costs.

Description

Technical Field

[0001] This utility model belongs to the technical field of mixed gas-liquid fluid equipment in the industrial automation industry, specifically relating to an automatic drainer for low-pressure and medium-high-pressure gas systems. Background Technology

[0002] Currently, in the field of gas-liquid fluid mixing equipment in industrial automation, such as steam supply systems or air compressor supply systems, condensate generated in the system pipelines can affect the quality of the system gas and reduce the performance of downstream components using the gas. In practice, automatic drainers are typically installed in gas-liquid fluid mixing equipment to drain the condensate generated in the system pipelines.

[0003] Conventional automatic drainers come in various structural forms, including mechanical float type and electronic control type. In low-pressure gas supply systems of 0-15 bar, mechanical float type automatic drainers are usually installed. Their advantage is that they can automatically detect the liquid level. When the liquid accumulates in the container to a certain level, the float rises and drives the draining device to open the valve to achieve automatic drainage. When the liquid is discharged to a certain level, the float resets and the draining device is reset by the gas, and the valve closes. In medium-pressure gas systems above 15 bar, mechanical float-type automatic drainers cannot withstand medium to high gas pressures. Electronically controlled automatic drainers, such as timed drainers, are generally selected. These drainers are pre-set to open the solenoid valve at set times to drain the gas. However, they lack water level detection, meaning they will drain even when there is no liquid in the system, resulting in pressure loss. They are also larger and more expensive. Alternatively, in medium-pressure gas systems above 15 bar, automatic drainers with liquid level sensors are also used. When the liquid level in the container rises to a set level, the sensor detects the liquid and sends a signal to the control system. The control system then opens the solenoid valve to drain the liquid. When the liquid level drops to a low level, the control system closes the solenoid valve. Automatic drainers with liquid level sensors can drain liquid without losing gas, but they are larger, more expensive, and have more complex control methods. Utility Model Content

[0004] In order to overcome the above-mentioned shortcomings of the prior art, the purpose of this utility model is to provide an automatic drainer applicable to low-pressure and medium-high-pressure gas systems.

[0005] The technical solution adopted by this utility model to solve its technical problem is: An automatic drainer for low-pressure and medium-high-pressure gas systems includes an upper valve body, a middle valve body, a lower valve body, a piston, an elastic reset element, a valve core, and a connecting element. The upper valve body is provided with an upper cavity, a first liquid channel for liquid to pass through, and a first gas channel for gas to pass through. The upper cavity is respectively connected to the first liquid channel and the first gas channel. The valve body is provided with a central cavity and a second liquid channel for liquid to pass through, the second liquid channel being configured to communicate with the central cavity; The lower valve body is provided with a lower cavity and a third liquid channel for liquid to pass through; The two ends of the middle valve body are respectively connected to the upper valve body and the lower valve body, and the middle cavity is connected to the upper cavity and the lower cavity; The piston is disposed in the upper valve body and slides in cooperation with the upper cavity and the first gas passage. The valve core is disposed in the middle valve body and slides with the middle cavity. One end of the valve core is connected to the piston. The valve core is provided with a first valve core portion and a second valve core portion. The elastic reset member is sleeved on the valve core member, one end of the elastic reset member abuts against the piston member, and the other end abuts against the middle valve body; The connector is connected to the lower valve body; During the sliding of the piston relative to the upper valve body, the first valve core can block the connection between the upper cavity and the middle cavity, and the second valve core can block the connection between the middle cavity and the lower cavity.

[0006] Preferably, the piston component includes a first piston body and a second piston body, the first piston body is connected to the second piston body, the first piston body is slidably engaged with the first gas passage portion, the second piston body is slidably engaged with the upper cavity, the bottom of the second piston body is connected to one end of the valve core component, and an upper mating groove portion is provided at the bottom of the second piston body to engage and abut against one end of the elastic reset component.

[0007] Preferably, the bottom of the second piston body is provided with a plurality of limiting protrusions surrounding the upper mating groove; A first sealing ring and a second sealing ring are respectively provided on the first piston body and the second piston body.

[0008] Preferably, the valve core component includes a valve stem component, and the first valve core portion and the second valve core portion are provided with the valve stem component. One end of the valve stem component is connected to the piston component, and the other end is connected to the second valve core portion.

[0009] Preferably, the valve body further comprises a lower mating groove, a first intermediate connecting channel, a second intermediate connecting channel, and a water passage groove; The lower mating groove and the water passage groove are located at the top end face of the middle valve body. The lower mating groove mates with and abuts against the other end of the elastic reset member. There are two or more water passage grooves arranged around the lower mating groove. The first intermediate connecting channel is used to connect the water passage section and the intermediate cavity. The first intermediate connecting channel allows the valve stem of the valve core to pass through. The second intermediate connecting channel is used to connect the intermediate cavity and the lower cavity. The first valve core is located in the intermediate cavity, and the second valve core is located in the second intermediate connecting channel. The first valve core cooperates with the channel opening of the first middle connecting channel to block the connection between the upper cavity and the middle cavity; The second valve core cooperates with the channel opening of the second middle connecting channel to block the connection between the middle cavity and the lower cavity.

[0010] Preferably, the first valve core and the second valve core are respectively provided with a third sealing ring and a fourth sealing ring.

[0011] Preferably, the cross-sectional area of ​​the first valve core is smaller than that of the second valve core.

[0012] Preferably, the upper valve body and the middle valve body are threaded together, and a fifth sealing ring is provided at the connection between the upper valve body and the middle valve body; The lower valve body and the middle valve body are threaded together, and a sixth sealing ring is provided at the connection between the lower valve body and the middle valve body.

[0013] Preferably, there are two first liquid channels, which are symmetrically arranged on both sides of the upper cavity; The number of the second liquid channel sections is two or more and they are evenly distributed around the perimeter of the central cavity.

[0014] Preferably, the connector is a nut, and the connector is threaded to the lower valve body; The elastic reset component is a spring.

[0015] Compared with the prior art, the beneficial effects of this utility model include: Compared with traditional electronic timed discharge devices or discharge devices composed of liquid level sensors, this application has a reasonable structural design, reduces electronic sensors, has a small overall size, automatically detects liquid level and discharges automatically, and achieves the function of discharging liquid without venting air. At the same time, the control method is simple, does not require circuit control wiring, and the product is safer to use, has a longer lifespan and lower operating costs. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0018] Figure 2 This is a schematic diagram of the cross-sectional structure of this utility model.

[0019] Figure 3 This is a three-dimensional structural diagram of the valve core component of this utility model.

[0020] Figure 4 This is a schematic diagram of the internal structure of this utility model.

[0021] in: 1-Upper valve body, 11-Upper cavity, 12-First liquid passage, 13-First gas passage, 14-Fifth sealing ring; 2-Middle valve body, 21-Middle cavity, 22-Second liquid channel section, 23-Lower mating groove section, 24-First middle connecting channel, 25-Second middle connecting channel, 26-Water channel section; 3-Lower valve body, 31-Lower cavity, 32-Third liquid passage, 33-Sixth sealing ring; 4-Piston assembly, 41-First piston body, 42-Second piston body, 43-Upper mating groove, 44-Limiting protrusion, 45-First sealing ring, 46-Second sealing ring; 5-Elastic reset element; 6-Valve core component, 61-First valve core section, 62-Second valve core section, 63-Valve stem component, 64-Third sealing ring, 65-Fourth sealing ring; 7-Connectors. Detailed Implementation

[0022] To better understand the above-mentioned objectives, features, and advantages of this utility model, it will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. Many specific details are set forth in the following description to provide a thorough understanding of this utility model; the described embodiments are merely some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0024] Example 1 like Figure 1-4 As shown, this embodiment provides an automatic drainer for low-pressure and medium-high-pressure gas systems, including an upper valve body 1, a middle valve body 2, a lower valve body 3, a piston 4, an elastic reset 5, a valve core 6, and a connecting part 7; The upper valve body 1 is provided with an upper cavity 11, a first liquid channel 12 for liquid to pass through, and a first gas channel 13 for gas to pass through. The upper cavity 11 is respectively connected to the first liquid channel 12 and the first gas channel 13. The valve body 2 is provided with a central cavity 21 and a second liquid channel 22 for liquid to pass through, and the second liquid channel 22 is configured to communicate with the central cavity 21; The lower valve body 3 is provided with a lower cavity 31 and a third liquid channel 32 for liquid to pass through; The two ends of the middle valve body 2 are respectively connected to the upper valve body 1 and the lower valve body 3, and the middle cavity 21 is connected to the upper cavity 11 and the lower cavity 31; Piston 4 is located inside upper valve body 1 and slides in cooperation with upper cavity 11 and first gas passage 13. The valve core 6 is located inside the middle valve body 2 and slides with the middle cavity 21. One end of the valve core 6 is connected to the piston 4. The valve core 6 is provided with a first valve core part 61 and a second valve core part 62. The elastic reset member 5 is sleeved on the valve core member. One end of the elastic reset member 5 abuts against the piston member 4, and the other end abuts against the middle valve body 2. Connector 7 is connected to the lower valve body 3; During the sliding process of piston 4 relative to upper valve body 1, first valve core 61 can block the connection between upper cavity 11 and middle cavity 21, and second valve core 62 can block the connection between middle cavity 21 and lower cavity 31.

[0025] In this embodiment, the automatic drainer is connected to the outlet of the steam supply system or the air compressor supply system. The condensate generated by the system pipeline in the steam supply system or the air compressor supply system enters the automatic drainer through the first liquid channel 12 and the second liquid channel 22. When the water level of the condensate in the automatic drainer reaches the set capacity, the gas at the outlet moves the piston 4 through the first gas channel 13. The piston moves the valve core 6. After the first valve core 61 and the second valve core 62 of the valve core 6 are unblocked, the condensate in the automatic drainer can be discharged from the third liquid channel 32. When the condensate level in the automatic drainer drops, gas further enters the drainer. The gas pressure, combined with the elastic force of the resilient reset element 5, drives the piston element 4 to reset, causing the first valve core 61 and the second valve core 62 to return to their sealed state. The automatic drainer then collects the condensate from the next operation for temporary storage, allowing the draining process to repeat cyclically at the set maximum pressure value.

[0026] Compared with traditional electronic timed discharge devices or discharge devices composed of liquid level sensors, this embodiment has a reasonable structural design, reduces electronic sensors, has a small overall size, automatically detects liquid level and discharges automatically, and achieves the function of discharging liquid without venting air. At the same time, the control method is simple, does not require circuit control wiring, and the product is safer to use, has a longer lifespan, and has a lower operating cost.

[0027] The specific structure of piston component 4 in this embodiment is as follows: It includes a first piston body 41 and a second piston body 42. The first piston body 41 is connected to the second piston body 42. The first piston body 41 is slidably engaged with the first gas passage portion 13. The second piston body 42 is slidably engaged with the upper cavity 11. The bottom of the second piston body 42 is connected to one end of the valve core 6. An upper mating groove portion 43 is provided at the bottom of the second piston body 42, which is engaged with and abuts against one end of the elastic reset member 5.

[0028] Specifically, the bottom of the second piston body 42 is provided with several limiting protrusions 44 surrounding the mating groove 43; A first sealing ring 45 and a second sealing ring 46 are respectively provided on the first piston body 41 and the second piston body 42.

[0029] The first sealing ring 45 and the second sealing ring 46 mentioned above increase the sealing between the first piston body 41 and the first gas passage 13 and between the second piston body 42 and the upper cavity 11, thereby improving the stability of the gas pressure effect on the piston 4.

[0030] The specific structure of the valve core 6 in this embodiment is as follows: The device includes a valve stem 63. The first valve core 61 and the second valve core 62 are provided with valve stems 63. One end of the valve stem 63 is connected to the piston 4, and the other end is connected to the second valve core 62.

[0031] Specifically, the middle valve body 2 is also provided with a lower mating groove 23, a first middle connecting channel 24, a second middle connecting channel 25, and a water passage groove 26; The lower mating groove 23 and the water passage groove 26 are located at the top end face of the middle valve body 2. The lower mating groove 23 mates with and abuts against the other end of the elastic reset member 5. There are two or more water passage grooves 26 arranged around the lower mating groove 23. The aforementioned water channel 26 is arranged around the lower cooperating channel 23 to facilitate the condensed liquid to better pass through the upper cavity 11 and enter the first intermediate connecting channel 24.

[0032] The first intermediate connecting channel 24 is used to connect the water tank 26 and the middle cavity 21. The first intermediate connecting channel 24 allows the valve stem 63 of the valve core 6 to pass through. The second intermediate connecting channel 25 is used to connect the middle cavity 21 and the lower cavity 31. The first valve core 61 is located in the middle cavity 21, and the second valve core 62 is located in the second intermediate connecting channel 25. The first valve core 61 cooperates with the channel opening of the first intermediate connecting channel 24 to block the connection between the upper cavity 11 and the middle cavity 21. The second valve core 62 cooperates with the channel opening of the second intermediate connecting channel 25 to block the connection between the middle cavity 21 and the lower cavity 31.

[0033] In this embodiment, the first valve core 61 and the second valve core 62 are respectively provided with a third sealing ring 64 and a fourth sealing ring 65. Specifically, the third sealing ring 64 cooperates with the channel opening of the first intermediate connecting channel 24, and the fourth sealing ring 65 cooperates with the channel opening of the second intermediate connecting channel 25 to achieve the sealing effect and ensure the sealing performance of the sealing effect.

[0034] In this embodiment, the cross-sectional area of ​​the first valve core 61 is smaller than that of the second valve core 62, and the cross-sectional area of ​​the first piston body 41 is smaller than that of the second piston body 42. Based on the above structure, it has sealing area and force-bearing area of ​​different sizes, and can withstand low-pressure and medium-high-pressure gas or liquid.

[0035] Specifically, the upper valve body 1 and the middle valve body 2 are connected by threads, and a fifth sealing ring 14 is provided at the connection between the upper valve body 1 and the middle valve body 2; The lower valve body 3 and the middle valve body 2 are connected by threads, and a sixth sealing ring 33 is provided at the connection between the lower valve body 3 and the middle valve body 2.

[0036] The above structure facilitates the assembly of the overall structure and the stability of the assembled structure.

[0037] Specifically, there are two first liquid channel sections 12, which are symmetrically arranged on both sides of the upper cavity 11; The number of second liquid channel sections 22 is two or more and they are evenly distributed around the central cavity 21.

[0038] Specifically, the connector 7 is a nut, and the connector 7 is threadedly connected to the lower valve body 3. The lower valve body 3 can be assembled and fixed to the container through the connector 7.

[0039] In this embodiment, the elastic reset member 5 is a spring member, and it cooperates with the upper mating groove 43 and the lower mating groove 23 to ensure the stability of the installation and fixation.

[0040] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Therefore, any modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. An automatic drain for use in low pressure, medium-high pressure gas systems, characterized in that, It includes an upper valve body, a middle valve body, a lower valve body, a piston component, an elastic reset component, a valve core component, and connecting components; The upper valve body is provided with an upper cavity, a first liquid channel for liquid to pass through, and a first gas channel for gas to pass through. The upper cavity is respectively connected to the first liquid channel and the first gas channel. The valve body is provided with a central cavity and a second liquid channel for liquid to pass through, the second liquid channel being configured to communicate with the central cavity; The lower valve body is provided with a lower cavity and a third liquid channel for liquid to pass through; The two ends of the middle valve body are respectively connected to the upper valve body and the lower valve body, and the middle cavity is configured to communicate with the upper cavity and the lower cavity; The piston is disposed in the upper valve body and slides in cooperation with the upper cavity and the first gas passage. The valve core is disposed in the middle valve body and slides with the middle cavity. One end of the valve core is connected to the piston. The valve core is provided with a first valve core portion and a second valve core portion. The elastic reset member is sleeved on the valve core member, one end of the elastic reset member abuts against the piston member, and the other end abuts against the middle valve body; The connector is connected to the lower valve body; During the sliding of the piston relative to the upper valve body, the first valve core can block the connection between the upper cavity and the middle cavity, and the second valve core can block the connection between the middle cavity and the lower cavity.

2. The automatic drain according to claim 1, applied to a low pressure, medium-high pressure gas system, characterized in that, The piston assembly includes a first piston body and a second piston body. The first piston body is connected to the second piston body. The first piston body is slidably engaged with the first gas passage portion. The second piston body is slidably engaged with the upper cavity. The bottom of the second piston body is connected to one end of the valve core component. An upper mating groove is provided at the bottom of the second piston body to engage with and abut against one end of the elastic reset component.

3. The automatic drain according to claim 2, applied to low pressure, medium-high pressure gas systems, characterized in that, The bottom of the second piston body is provided with several limiting protrusions surrounding the upper mating groove; A first sealing ring and a second sealing ring are respectively provided on the first piston body and the second piston body.

4. The automatic drain according to claim 1, applied to low pressure, medium-high pressure gas systems, characterized in that, The valve core component includes a valve stem component. The first valve core portion and the second valve core portion are provided with the valve stem component. One end of the valve stem component is connected to the piston component, and the other end is connected to the second valve core portion.

5. The automatic drain according to claim 4, applied to low pressure, medium-high pressure gas systems, characterized in that, The valve body is also provided with a lower mating groove, a first middle connecting channel, a second middle connecting channel, and a water passage groove. The lower mating groove and the water passage groove are located at the top end face of the middle valve body. The lower mating groove mates with and abuts against the other end of the elastic reset member. There are two or more water passage grooves arranged around the lower mating groove. The first intermediate connecting channel is used to connect the water passage section and the intermediate cavity. The first intermediate connecting channel allows the valve stem of the valve core to pass through. The second intermediate connecting channel is used to connect the intermediate cavity and the lower cavity. The first valve core is located in the intermediate cavity, and the second valve core is located in the second intermediate connecting channel. The first valve core cooperates with the channel opening of the first middle connecting channel to block the connection between the upper cavity and the middle cavity; The second valve core cooperates with the channel opening of the second middle connecting channel to block the connection between the middle cavity and the lower cavity.

6. The automatic drain according to claim 1, applied to low pressure, medium-high pressure gas systems, characterized in that, The first valve core and the second valve core are respectively provided with a third sealing ring and a fourth sealing ring.

7. The automatic drain according to claim 1, applied to low pressure, medium-high pressure gas systems, characterized in that, The cross-sectional area of ​​the first valve core is smaller than that of the second valve core.

8. The automatic drain according to claim 1, applied to low pressure, medium-high pressure gas systems, characterized in that, The upper valve body and the middle valve body are threaded together, and a fifth sealing ring is provided at the connection between the upper valve body and the middle valve body; The lower valve body and the middle valve body are threaded together, and a sixth sealing ring is provided at the connection between the lower valve body and the middle valve body.

9. The automatic drain according to claim 1, applied to low pressure, medium-high pressure gas systems, characterized in that, The number of the first liquid channel sections is two, and they are symmetrically arranged on both sides of the upper cavity; The number of the second liquid channel sections is two or more and they are evenly distributed around the perimeter of the central cavity.

10. The automatic drain according to claim 1, applied to low pressure, medium-high pressure gas systems, characterized in that, The connecting component is a nut, and the connecting component is threadedly connected to the lower valve body; The elastic reset component is a spring.

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