Sampler with good leakproofness

Abstract

The utility model relates to a sampler with good leakproofness, which belongs to the technical field of samplers and comprises a sampler barrel, a liquid storage barrel is fixedly mounted in the sampler barrel, a piston plate is slidably connected in the liquid storage barrel, and a liquid inlet pipe is fixedly connected to the bottom of the liquid storage barrel. The liquid sampling device has the beneficial effects that when liquid is sampled, the liquid rushes into the conversion box and extrudes the springs on the two sides of the closed circular plate, and at the moment, the liquid passes through the fixing ring and then enters the liquid inlet pipe through the liquid outlet groove, so that the sampling purpose can be realized; when the switching box is used, the sealing circular plate cannot be impacted by liquid, at the moment, the sealing circular plate can be pushed to reset through the elastic force of the spring, the sealing circular plate is tightly attached to the fixing ring, the sealing performance is improved, air outside the switching box is prevented from entering the liquid storage cylinder, and the influence of air moisture on the analysis quality of products is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of samplers, in particular to a sampler with good airtightness. Background Art

[0002] The sealed sampler is suitable for leak-free sampling of various media within pipelines in petroleum and chemical plants, especially medium- and low-pressure gas and liquid media that are toxic, flammable, and explosive. It provides high sample authenticity and accuracy, eliminates residual liquid and gas emissions, and effectively prevents harm from toxic and hazardous media while simultaneously protecting the environment and avoiding potential accidents caused by flammable and explosive media during sampling.

[0003] After searching, a Chinese patent disclosed a new type of liquid sampler (authorization announcement number CN201327454Y), which includes a long sampling tube and a sampling curved tube. The long sampling tube, a ball valve, a hand pump, a ball valve and a sampling curved tube are connected in sequence on the skeleton. Although this patented technology can solve the problem of sampling failure caused by the presence of air in the tube during sampling; the problem of blocked pipes caused by sediment at the bottom of the container.

[0004] However, when the above technology is used to sample liquids with strong water absorption, the liquid will absorb moisture in the air when exposed to the air, which will affect the analytical quality of the product. Utility Model Content

[0005] In view of the above problems existing in the prior art, the main purpose of the present invention is to provide a sampler with good airtightness.

[0006] The technical solution of the present utility model is as follows: a sampler with good airtightness, comprising a sampler cylinder, a liquid storage cylinder fixedly installed inside the sampler cylinder, a piston plate slidably connected to the inside of the liquid storage cylinder, a liquid inlet pipe fixedly connected to the bottom of the liquid storage cylinder, a conversion box fixedly connected to the bottom end of the liquid inlet pipe, a liquid outlet pipe fixedly connected to the outside of the liquid storage cylinder, a first check valve fixedly installed inside the liquid outlet pipe, a flow meter fixedly installed inside the liquid inlet pipe, a second check valve fixedly installed inside the liquid inlet pipe and below the flow meter, and a sealed component is provided inside the conversion box.

[0007] By adopting the above technical solution, through the action of the first check valve and the second check valve, not only can the liquid be prevented from flowing back, ensuring the normal use of the sampler cylinder, but the check valve can also be applied to both liquid and gas, which can prevent the air in the liquid outlet pipe from entering the interior of the liquid storage cylinder during the sampling process. The setting of the sealed component can prevent the gas in the conversion box from entering the interior of the liquid storage cylinder after the sampling is completed.

[0008] As a preferred embodiment, the sealed component includes sliding grooves opened on both sides of the inner wall of the conversion box, the interior of the sliding grooves is fixedly connected with a positioning rod, the outer side of the positioning rod is slidably connected with a slider, a sealed circular plate is fixedly connected between the two sliders, a spring is sleeved on the outer side of the positioning rod and located above the slider, and a fixing ring is fixedly connected to the interior of the conversion box and located below the sealed circular plate.

[0009] By adopting the above technical solution, the elastic force of the spring will push the sealed circular plate to reset, so that the sealed circular plate and the fixing ring fit tightly, improving the sealing performance to prevent air outside the conversion box from entering the interior of the liquid storage cylinder.

[0010] As a preferred embodiment, the sealed component also includes a sealing ring fixedly connected to one side of the sealed circular plate, the sealing ring is arranged on the side of the sealed circular plate close to the fixed ring, the top of the fixed ring is provided with a sealing groove used in conjunction with the sealing ring, the sealing groove is engaged with the sealing ring, and the inner wall of the conversion box and both sides of the sealed circular plate are provided with liquid outlet grooves.

[0011] By adopting the above technical solution, the sealing ring and the sealing groove are used in conjunction to improve the sealing between the sealed circular plate and the fixed ring, and prevent air from flowing through the gap into the interior of the liquid storage cylinder and contacting the liquid.

[0012] As a preferred embodiment, an electric telescopic rod is fixedly installed on the top of the sampler cylinder, and the piston rod of the electric telescopic rod extends to the interior of the liquid storage cylinder and is fixedly connected to the piston plate.

[0013] By adopting the above technical solution, the piston plate can be driven to move in the liquid storage cylinder through the extension and retraction of the piston rod of the electric telescopic rod.

[0014] As a preferred embodiment, flow tubes are fixedly installed at equal distances on the top of the liquid storage cylinder, the top of the flow tubes extends to the outside of the sampler cylinder, and a connecting flange is provided at one end of the liquid outlet pipe away from the liquid storage cylinder.

[0015] By adopting the above technical solution and providing the flow pipe, the air on the piston plate can be circulated, thereby cooperating with the piston plate to perform piston movement and ensuring the normal use of the liquid storage cylinder.

[0016] As a preferred embodiment, a controller is fixedly mounted on the outside of the sampler cylinder, a display screen is fixedly mounted on one side of the sampler cylinder, and the display screen, electric telescopic rod and flow meter are all electrically connected to the controller.

[0017] By adopting the above technical solution, the display screen, the electric telescopic rod and the flow meter can be controlled to start and stop by the controller.

[0018] As a preferred embodiment, the bottom end of the inner wall of the liquid storage cylinder is provided with an inclined surface for facilitating liquid discharge, and the bottom end of the piston plate is provided with an arc surface for use with the inclined surface.

[0019] By adopting the above technical solution, the liquid in the liquid storage cylinder can be completely discharged through the cooperation of the arc surface and the inclined surface, thereby avoiding the occurrence of liquid residue in the liquid storage cylinder.

[0020] As a preferred embodiment, a second connecting flange is fixedly connected to the bottom end of the conversion box, the sampler cylinder and the liquid storage cylinder are both made of transparent materials, and the liquid outlet pipe is an oblique structure.

[0021] By adopting the above technical solution and using flange 1 and flange 2, the inflow of air during sampling can be reduced.

[0022] Compared with the prior art, the advantages and positive effects of the present invention are:

[0023] 1. In the utility model, when it is necessary to sample the liquid, the piston rod of the electric telescopic rod can be controlled to contract, which will drive the piston plate to slide in the liquid storage cylinder, so that negative pressure is generated in the liquid storage cylinder, and the sampled liquid is sucked into the interior of the liquid storage cylinder through the liquid inlet pipe. The liquid in the liquid storage cylinder can be discharged through the liquid outlet pipe by squeezing the piston plate. The first check valve and the second check valve can not only prevent the liquid from flowing back, ensuring the normal use of the sampler cylinder, but also the check valve can be applied to both liquid and gas, which can prevent the air in the liquid outlet pipe from entering the interior of the liquid storage cylinder during the sampling process. The setting of the sealed component can prevent the gas in the conversion box from entering the interior of the liquid storage cylinder after the sampling is completed, and the flow rate of the liquid flowing into the liquid storage cylinder can be monitored by the flow meter, so as to better use the sampler cylinder.

[0024] 2. In the present invention, when the liquid is sampled, the liquid will rush into the conversion box and squeeze the springs on both sides of the closed circular plate. At this time, the liquid will pass through the fixed ring and then enter the interior of the liquid inlet pipe through the liquid outlet groove, thereby achieving the sampling purpose. After the liquid sampling is completed, the closed circular plate will not be impacted by the liquid. At this time, the elastic force of the spring will push the closed circular plate to reset, so that the closed circular plate and the fixed ring fit tightly, thereby improving the sealing, so as to prevent the air outside the conversion box from entering the interior of the liquid storage cylinder, thereby reducing the impact of air moisture on the analysis quality of the product.

[0025] 3. In the present invention, the sealing ring and the sealing groove are used in conjunction to improve the sealing between the sealed circular plate and the fixed ring, thereby preventing air from flowing through the gap to the inside of the liquid storage cylinder and coming into contact with the liquid, thereby further improving the sealing performance of the sealed circular plate and the fixed ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 The utility model provides an overall three-dimensional diagram of a sampler with good sealing performance;

[0027] Figure 2 A half-section view of a sampler with good sealing performance is provided for the utility model;

[0028] Figure 3 The utility model provides a schematic diagram of the internal structure of a sampler with good sealing performance;

[0029] Figure 4 The utility model provides a sampler with good sealing performance. Figure 2 Enlarged view of point A in the middle.

[0030] Legend: 1. Sampler cylinder; 2. Controller; 3. Display screen; 4. Liquid outlet pipe; 5. First check valve; 6. Liquid storage cylinder; 7. Piston plate; 8. Electric telescopic rod; 9. Flow tube; 10. Flow meter; 11. Second check valve; 12. Liquid inlet pipe; 13. Conversion box; 14. Slide; 15. Spring; 16. Positioning rod; 17. Slider; 18. Sealed circular plate; 19. Liquid outlet trough; 20. Sealing groove; 21. Sealing ring; 22. Fixing ring. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0032] Reference Figures 1-4, a sampler with good sealing performance, including a sampler cylinder 1, a liquid storage cylinder 6 is fixedly installed inside the sampler cylinder 1, a piston plate 7 is slidably connected to the inside of the liquid storage cylinder 6, a liquid inlet pipe 12 is fixedly connected to the bottom of the liquid storage cylinder 6, and the bottom end of the liquid inlet pipe 12 is fixedly connected to a conversion box 13, the outside of the liquid storage cylinder 6 is fixedly connected to a liquid outlet pipe 4, a first check valve 5 is fixedly installed inside the liquid outlet pipe 4, a flow meter 10 is fixedly installed inside the liquid inlet pipe 12, a second check valve 11 is fixedly installed inside the liquid inlet pipe 12 and below the flow meter 10, a sealed component is provided inside the conversion box 13, when it is necessary to sample the liquid, the piston rod of the electric telescopic rod 8 can be controlled to retract, which will drive the piston plate 7 to slide in the liquid storage cylinder 6, This creates a negative pressure in the liquid storage cylinder 6, and the sampled liquid is sucked into the interior of the liquid storage cylinder 6 through the liquid inlet pipe 12. The liquid in the liquid storage cylinder 6 can be discharged through the liquid outlet pipe 4 by squeezing the piston plate 7. The first check valve 5 and the second check valve 11 can not only prevent the liquid from flowing back, ensuring the normal use of the sampler cylinder 1, but the check valve can also be applied to both liquid and gas, preventing the air in the liquid outlet pipe 4 from entering the interior of the liquid storage cylinder 6 during the sampling process. The setting of the sealed component can prevent the gas in the conversion box 13 from entering the interior of the liquid storage cylinder 6 after the sampling is completed, and the flow meter 10 can monitor the flow of liquid flowing into the liquid storage cylinder 6, so as to better use the sampler cylinder 1.

[0033] Reference Figure 4 The sealed component includes a chute 14 opened on both sides of the inner wall of the conversion box 13, the interior of the chute 14 is fixedly connected with a positioning rod 16, the outer side of the positioning rod 16 is slidably connected with a slider 17, and a sealed circular plate 18 is fixedly connected between the two sliders 17. The outer side of the positioning rod 16 and the upper part of the slider 17 are provided with a spring 15. The interior of the conversion box 13 and the lower part of the sealed circular plate 18 are fixedly connected with a fixing ring 22. When the liquid is sampled, the liquid will rush into the conversion box 13 and the closed circular plate 18 on both sides will be fixed. The spring 15 causes squeezing. At this time, the liquid will pass through the fixed ring 22 and then enter the interior of the liquid inlet pipe 12 through the liquid outlet groove 19, thereby achieving the sampling purpose. After the liquid sampling is completed, the sealed circular plate 18 cannot be impacted by the liquid. At this time, the elastic force of the spring 15 will push the sealed circular plate 18 to reset, so that the sealed circular plate 18 and the fixed ring 22 fit tightly, improving the sealing, so as to prevent the air outside the conversion box 13 from entering the interior of the liquid storage cylinder 6, so as to reduce the impact of air moisture on the analysis quality of the product.

[0034] Reference Figure 4The sealed component also includes a sealing ring 21 fixedly connected to one side of the sealed circular plate 18. The sealing ring 21 is arranged on one side of the sealed circular plate 18 close to the fixing ring 22. The top of the fixing ring 22 is provided with a sealing groove 20 used in conjunction with the sealing ring 21. The sealing groove 20 is engaged with the sealing ring 21. The inner wall of the conversion box 13 and both sides of the sealed circular plate 18 are provided with liquid outlet grooves 19. Through the use of the sealing ring 21 and the sealing groove 20, the sealing between the sealed circular plate 18 and the fixing ring 22 can be improved, and the air can be prevented from flowing through the gap to the inside of the liquid storage cylinder 6 and contacting the liquid, thereby further improving the sealing performance of the sealed circular plate 18 and the fixing ring 22.

[0035] Reference Figure 2 An electric telescopic rod 8 is fixedly installed on the top of the sampler cylinder 1. The piston rod of the electric telescopic rod 8 extends to the inside of the liquid storage cylinder 6 and is fixedly connected to the piston plate 7. Through the extension and retraction of the piston rod of the electric telescopic rod 8, the piston plate 7 can be driven to move in the liquid storage cylinder 6, thereby realizing the sampling and sample discharging operations of the liquid.

[0036] Reference Figure 2 The top of the liquid storage cylinder 6 is evenly fixed with flow tubes 9, and the top of the flow tubes 9 extends to the outside of the sampler cylinder 1. The end of the liquid outlet pipe 4 away from the liquid storage cylinder 6 is provided with a connecting flange 1. The flow tubes 9 are provided to facilitate the circulation of air on the piston plate 7, thereby cooperating with the piston plate 7 to perform piston movement and ensure the normal use of the liquid storage cylinder 6.

[0037] Reference Figure 1 A controller 2 is fixedly installed on the outside of the sampler cylinder 1, and a display screen 3 is fixedly installed on one side of the sampler cylinder 1. The display screen 3, the electric telescopic rod 8 and the flow meter 10 are all electrically connected to the controller 2. The display screen 3, the electric telescopic rod 8 and the flow meter 10 can be controlled to start and stop by the controller 2.

[0038] Reference Figure 3 The bottom end of the inner wall of the liquid storage cylinder 6 is provided with an inclined surface for facilitating liquid drainage, and the bottom end of the piston plate 7 is provided with an arc surface used in conjunction with the inclined surface. Through the cooperation of the arc surface and the inclined surface, the liquid in the liquid storage cylinder 6 can be completely discharged to avoid the occurrence of liquid residue in the liquid storage cylinder 6.

[0039] Reference Figure 2 The bottom end of the conversion box 13 is fixedly connected with a connecting flange 2. The sampler cylinder 1 and the liquid storage cylinder 6 are both made of transparent materials. The liquid outlet pipe 4 is an oblique structure. By using flange 1 and flange 2, the inflow of air during sampling can be reduced, and the oblique structure of the liquid outlet pipe 4 is set to reduce the liquid residue in the liquid outlet pipe 4.

[0040] Working principle: First, when it is necessary to sample the liquid, the piston rod of the electric telescopic rod 8 can be controlled by the controller 2 to retract, which will drive the piston plate 7 to slide in the liquid storage cylinder 6, so that negative pressure is generated in the liquid storage cylinder 6, and the sampled liquid is sucked into the interior of the liquid storage cylinder 6 through the liquid inlet pipe 12. The liquid in the liquid storage cylinder 6 can be discharged through the liquid outlet pipe 4 by squeezing the piston plate 7. The first check valve 5 and the second check valve 11 can not only prevent the liquid from flowing back, ensuring the normal use of the sampler cylinder 1, but also the check valve can be applied to both liquid and gas, which can prevent the air in the liquid outlet pipe 4 from entering the interior of the liquid storage cylinder 6 during the sampling process.

[0041] When the liquid rushes into the conversion box 13, it will squeeze the springs 15 on both sides of the sealed circular plate 18. At this time, the liquid will pass through the fixing ring 22 and then enter the interior of the liquid inlet pipe 12 through the liquid outlet groove 19, thereby achieving the sampling purpose. When the liquid sampling is completed, the sealed circular plate 18 can no longer be impacted by the liquid. At this time, the elastic force of the spring 15 will push the sealed circular plate 18 to reset, so that the sealed circular plate 18 and the fixing ring 22 are tightly fitted, improving the sealing performance to prevent air outside the conversion box 13 from entering the interior of the liquid storage cylinder 6. The cooperation of the sealing ring 21 and the sealing groove 20 can improve the sealing between the sealed circular plate 18 and the fixing ring 22, and prevent air from flowing through the gap into the interior of the liquid storage cylinder 6 and contacting the liquid, further improving the sealing performance of the sealed circular plate 18 and the fixing ring 22. Through the action of the flow meter 10, the liquid flow flowing into the liquid storage cylinder 6 can be monitored, and the liquid flow result can be displayed on the display screen 3, so that the staff can better use the sampler cylinder 1.

[0042] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connection" 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 an indirect connection through an intermediate medium, or it can be a connection between the internal parts 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 the specific circumstances.

[0043] The above are only preferred embodiments of the present application and are not intended to limit the present application. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A sampler with good sealing performance, comprising a sampler barrel (1), characterized in that: A liquid storage cylinder (6) is fixedly installed inside the sampler cylinder (1), a piston plate (7) is slidably connected inside the liquid storage cylinder (6), a liquid inlet pipe (12) is fixedly connected to the bottom of the liquid storage cylinder (6), a conversion box (13) is fixedly connected to the bottom end of the liquid inlet pipe (12), a liquid outlet pipe (4) is fixedly connected to the outside of the liquid storage cylinder (6), a first check valve (5) is fixedly installed inside the liquid outlet pipe (4), a flow meter (10) is fixedly installed inside the liquid inlet pipe (12), a second check valve (11) is fixedly installed inside the liquid inlet pipe (12) and below the flow meter (10), and a sealed component is provided inside the conversion box (13).

2. A sampler with good sealing performance according to claim 1, characterized in that: The sealed component includes a slide groove (14) opened on both sides of the inner wall of the conversion box (13), the interior of the slide groove (14) is fixedly connected to a positioning rod (16), the outer side of the positioning rod (16) is slidably connected to a slider (17), a sealed circular plate (18) is fixedly connected between the two sliders (17), a spring (15) is sleeved on the outer side of the positioning rod (16) and located above the slider (17), and a fixing ring (22) is fixedly connected to the interior of the conversion box (13) and located below the sealed circular plate (18).

3. The airtight sampler according to claim 1, characterized in that: The sealed component further comprises a sealing ring (21) fixedly connected to one side of the sealed circular plate (18), the sealing ring (21) being arranged on one side of the sealed circular plate (18) close to the fixed ring (22), the top of the fixed ring (22) being provided with a sealing groove (20) for use with the sealing ring (21), the sealing groove (20) being engaged with the sealing ring (21), and the inner wall of the conversion box (13) being provided with liquid outlet grooves (19) on both sides of the sealed circular plate (18).

4. The airtight sampler according to claim 1, characterized in that: An electric telescopic rod (8) is fixedly mounted on the top of the sampler cylinder (1), and a piston rod of the electric telescopic rod (8) extends into the interior of the liquid storage cylinder (6) and is fixedly connected to the piston plate (7).

5. The airtight sampler according to claim 1, characterized in that: The top of the liquid storage cylinder (6) is fixedly provided with flow tubes (9) at equal intervals, and the top of the flow tubes (9) extends to the outside of the sampler cylinder (1). The end of the liquid outlet pipe (4) away from the liquid storage cylinder (6) is provided with a connecting flange 1.

6. The airtight sampler according to claim 1, characterized in that: A controller (2) is fixedly mounted on the outside of the sampler barrel (1), and a display screen (3) is fixedly mounted on one side of the sampler barrel (1). The display screen (3), the electric telescopic rod (8) and the flow meter (10) are all electrically connected to the controller (2).

7. The airtight sampler according to claim 1, characterized in that: The bottom end of the inner wall of the liquid storage cylinder (6) is provided with an inclined surface for facilitating liquid discharge, and the bottom end of the piston plate (7) is provided with an arc surface for use in conjunction with the inclined surface.

8. The airtight sampler according to claim 1, characterized in that: The bottom end of the conversion box (13) is fixedly connected to a second connecting flange. The sampler cylinder (1) and the liquid storage cylinder (6) are both made of transparent materials, and the liquid outlet pipe (4) is an oblique structure.

Images