Novel sampling valve

Abstract

The utility model provides a novel sampling valve which comprises a shell and a sliding valve rod located in the shell, the shell comprises an upper valve body, a middle valve body and a lower valve body which are fixedly connected in sequence, one end of the valve rod is located in the lower valve body and connected with a plug seat, and the other end of the valve rod is located at the outer end of the upper valve body and connected with a driving handle. An elastic device corresponding to the valve rod is arranged in the upper valve body; the corrugated pipe of the sealing device ensures the telescopic movement of the valve rod and isolates the inflow of liquid at the same time, so that the sealing effect of the sampling valve is enhanced; the handle is opened in a pressing mode, sampling is convenient, and the valve clack is automatically closed under the action of the spring after sampling; the outer end of the gas inlet pipeline is connected with high-pressure gas, so that media in the runner can be cleaned conveniently, and sampling next time is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a novel sampling valve. Background Art

[0002] In the dye chemical, pharmaceutical, papermaking, and alumina industries, regular and targeted testing and analysis of production materials is essential to obtain various technical information, confirming normal production and ensuring that technical indicators are reasonable, allowing for timely adjustments to the production process. This process is common in other industrial production processes, though the sampling methods and methods employed vary. For example, in the alumina production process, materials typically flow through pipes and containers. To obtain material from these pipes or containers, a sampling valve is required. Existing sampling valves typically use a rotary handle to control the valve, requiring re-closing after sampling, which is cumbersome and inconvenient to clean after sampling. Utility Model Content

[0003] The technical problem solved by the present invention is to provide a new type of sampling valve to solve the problems raised in the above background technology.

[0004] The technical problem solved by the present invention is achieved by adopting the following technical solutions: a new type of sampling valve, comprising a shell and a valve stem sliding in the shell, the shell comprising an upper valve body, a middle valve body and a lower valve body fixedly connected in sequence, one end of the valve stem is located in the lower valve body and is connected to a plug seat, the other end of the valve stem is located at the outer end of the upper valve body and is connected to a driving handle, and an elastic device is provided in the upper valve body corresponding to the valve stem; a connecting flow channel is provided in the middle valve body and the lower valve body to facilitate the outflow of the sampling liquid, a sampling pipe connected to the flow channel is provided at the side end of the middle valve body, and the sampling pipe is connected to the sampling bottle outside, the outer end of the valve stem located at the middle valve body is sleeved with a sealing device, the sealing device prevents liquid from entering the upper valve body and flowing out, and an air inlet pipe is provided on one side of the lower end of the lower valve body, and the air inlet pipe is connected to the flow channel.

[0005] Preferably, the valve stem drives the plug seat to move to control the cutting off and connection of the flow channel. The flow channel is located at the bottom end of the lower valve body and is provided with an inlet pipe connected to the equipment pipeline. A valve flap seat is provided on the inner side of the inlet pipe. The plug seat includes a valve flap and an arc-shaped docking joint. The front groove of the docking joint is sleeved against the valve stem. The screw in the plug seat is rotated into the screw hole corresponding to the valve stem to fix the connection. The valve flap is located at the end of the valve flap seat away from the middle valve body.

[0006] Preferably, the sealing device includes a sealing seat, a bellows and a pipe seat, and the sealing seat, bellows and pipe seat are connected in sequence. The sealing seat passes through the corresponding sealing hole inside the valve body and is fixed by a sealing cover. The valve stem is slidably connected in the sealing seat and the bellows and fixedly connected to the pipe seat. The movement of the valve stem drives the expansion and contraction of the bellows.

[0007] Preferably, the sealing seat is connected to the lower end of the sealing hole, a sealing gasket is fitted between the sealing seat and the sealing hole, the upper end of the sealing hole is located at the lower end of the sealing cover and a retaining spring is installed, and the retaining spring is clamped to the outer end of the sealing seat.

[0008] Preferably, the elastic device includes a spring and a spring seat, the spring seat is fixedly mounted on the valve stem located in the upper valve body, the upper end of the spring abuts against the spring seat, and the lower end of the spring is fixed on the sealing cover.

[0009] Preferably, one end of the handle is rotatably connected to the rotating column at the outer end of the upper valve body, and a sliding groove is provided at the end of the handle close to the rotating column. The upper end of the valve stem is slidably connected to the sliding groove on the handle through a pin.

[0010] Preferably, the outer end of the air inlet pipeline is connected to high-pressure gas, and an inclined plate is provided between the air inlet pipeline and the flow channel of the lower valve body to facilitate changing the direction of the gas outlet.

[0011] Compared with the prior art, the beneficial effects of the present invention are: the bellows of the sealing device ensures the telescopic movement of the valve stem while isolating the inflow of liquid, thereby enhancing the sealing effect of the sampling valve; the handle is opened by pressing, which is convenient for sampling, and after sampling, the valve disc automatically closes under the action of the spring; the outer end of the air inlet pipeline is connected to high-pressure gas to facilitate the cleaning of the medium in the flow channel, which is convenient for the next sampling. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural diagram of the utility model;

[0013] Figure 2 for Figure 1 Schematic diagram of the enlarged structure of part A in the middle. DETAILED DESCRIPTION

[0014] In order to make the technical means for realizing the present invention, the creative features, the objectives and the effects thereof easier to understand, the present invention is further described below with reference to specific illustrations.

[0015] like Figures 1-2 As shown,

[0016] In this embodiment, a new sampling valve is provided, comprising a shell 1 and a valve stem 2 sliding in the shell 1, the shell 1 comprising an upper valve body 11, a middle valve body 12 and a lower valve body 13 fixedly connected in sequence, one end of the valve stem 2 is located in the lower valve body 13 and is connected to a plug seat 3, the other end of the valve stem 2 is located at the outer end of the upper valve body 11 and is connected to a driving handle 4, and an elastic device is provided in the upper valve body 11 corresponding to the valve stem 2; a connecting flow channel 14 is provided in the middle valve body 12 and the lower valve body 13 to facilitate the outflow of the sampled liquid, a sampling pipe 15 connected to the flow channel 14 is provided at the side end of the middle valve body 12, and the sampling pipe 15 is connected to a sampling bottle externally, and the outer end of the valve stem 2 located at the middle valve body 12 is sleeved with a sealing device, which prevents liquid from entering the upper valve body 11 and flowing out, and an air inlet pipe 16 is provided on one side of the lower end of the lower valve body 13, and the air inlet pipe 16 is connected to the flow channel 14.

[0017] In this embodiment, the valve stem 2 drives the plug seat 3 to move and control the cutting off and connection of the flow channel 14. The flow channel 14 is located at the bottom end of the lower valve body 13 and is provided with an inlet pipe connected to the equipment pipeline. The inner side of the inlet pipe is provided with a valve disc seat 17. The plug seat 3 includes a valve disc 31 and an arc-shaped docking joint 32. The front groove of the docking joint 32 is sleeved against the valve stem 2. The screw 33 in the plug seat 3 is rotated into the corresponding screw hole of the valve stem 2 and is fixedly connected. The valve disc 31 is located at the end of the valve disc seat 17 away from the middle valve body 12 and the flow channel is cut off by the fit between the valve disc 31 and the valve disc seat 17.

[0018] In this embodiment, the sealing device includes a sealing seat 21, a bellows 22 and a tube seat 23. The sealing seat 21, the bellows 22 and the tube seat 23 are connected in sequence. The sealing seat 21 passes through the corresponding sealing hole inside the middle valve body 12 and is fixed by a sealing cover 24. The valve stem 2 is slidably connected in the sealing seat 21 and the bellows 22 and is fixedly connected to the tube seat 23. The movement of the valve stem 2 drives the expansion and contraction of the bellows 22.

[0019] In this embodiment, the sealing seat 21 is connected to the lower end of the sealing hole, and a sealing gasket 25 is provided between the sealing seat 21 and the sealing hole. The upper end of the sealing hole is located at the lower end of the sealing cover 24 and a retaining spring 26 is installed. The retaining spring 26 is clamped to the outer end of the sealing seat 21.

[0020] In this embodiment, the elastic device includes a spring 27 and a spring seat 28. The spring seat 28 is fixedly mounted on the valve stem 2 located in the upper valve body 11. The upper end of the spring 27 abuts against the spring seat 28, and the lower end of the spring 27 is fixed on the sealing cover 24.

[0021] In this embodiment, one end of the handle 4 is rotatably connected to the rotating column 41 at the outer end of the upper valve body 11, and a sliding groove 42 is provided at the end of the handle 4 close to the rotating column 41. The upper end of the valve stem 2 is slidably connected to the sliding groove 42 on the handle 4 through a pin 43.

[0022] In this embodiment, the outer end of the air inlet pipe 16 is connected to the high-pressure gas, and an inclined plate 18 is provided between the air inlet pipe 16 and the flow channel 14 of the lower valve body 13 to facilitate changing the direction of the gas outlet; the high-pressure gas passes through the inclined plate 18 and goes out obliquely upward and blows toward the arc-shaped docking joint 32, so that the plug seat 3 has an upward thrust, thereby preventing the gas from impacting the plug seat 3 and causing liquid to flow in.

[0023] The working principle of the present utility model is that the personnel handle 4 presses the valve stem 2 to descend, the valve disc 31 leaves the valve disc seat 17, and the liquid enters the sampling pipe 15 through the flow channel 14. After the sampling is completed, the handle 4 is loosened, and the valve stem 2 rises under the action of the spring 27, driving the valve disc 31 to rise and seal with the valve disc seat 17. The air inlet pipe 16 inputs high-pressure gas to clean the flow channel 14, and the residual medium is discharged through the sampling pipe 15.

[0024] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A novel sampling valve, comprising a housing and a valve stem sliding in the housing, characterized in that: The shell includes an upper valve body, a middle valve body and a lower valve body that are fixedly connected in sequence. One end of the valve stem is located in the lower valve body and is connected to a plug seat. The other end of the valve stem is located at the outer end of the upper valve body and is connected to a driving handle. An elastic device is provided in the upper valve body corresponding to the valve stem; a connecting flow channel is provided in the middle valve body and the lower valve body to facilitate the outflow of the sampled liquid, a sampling pipe connected to the flow channel is provided at the side end of the middle valve body, and a sampling bottle is connected to the outside of the sampling pipe, and a sealing device is sleeved on the outer end of the valve stem at the middle valve body to prevent liquid from entering the upper valve body and flowing out. An air inlet pipe is provided on one side of the lower end of the lower valve body, and the air inlet pipe is connected to the flow channel.

2. A new sampling valve according to claim 1, characterized in that: The valve stem drives the plug seat to move and control the cutting off and connection of the flow channel. The flow channel is located at the bottom end of the lower valve body and is provided with an inlet pipe connected to the equipment pipeline. A valve disc seat is provided on the inner side of the inlet pipe. The plug seat includes a valve disc and an arc-shaped docking joint. The front groove of the docking joint is sleeved against the valve stem. The screw in the plug seat is rotated into the screw hole corresponding to the valve stem and is fixedly connected. The valve disc is located at the end of the valve disc seat away from the middle valve body.

3. A new sampling valve according to claim 1, characterized in that: The sealing device includes a sealing seat, a bellows and a pipe seat, which are connected in sequence. The sealing seat passes through the corresponding sealing hole inside the valve body and is fixed by a sealing cover. The valve stem is slidably connected in the sealing seat and the bellows and fixedly connected to the pipe seat. The movement of the valve stem drives the expansion and contraction of the bellows.

4. A new sampling valve according to claim 3, characterized in that: The sealing seat is connected to the lower end of the sealing hole, and a sealing gasket is fitted between the sealing seat and the sealing hole. The upper end of the sealing hole is located at the lower end of the sealing cover and a retaining spring is installed. The retaining spring is clamped to the outer end of the sealing seat.

5. A new type of sampling valve according to claim 4, characterized in that: The elastic device includes a spring and a spring seat. The spring seat is fixedly mounted on the valve stem in the upper valve body. The upper end of the spring abuts against the spring seat, and the lower end of the spring is fixed on the sealing cover.

6. A novel sampling valve according to claim 1, characterized in that: One end of the handle is rotatably connected to the rotating column at the outer end of the upper valve body. A sliding groove is provided at the end of the handle close to the rotating column. The upper end of the valve stem is slidably connected to the sliding groove on the handle through a pin.

7. A novel sampling valve according to claim 1, characterized in that: The outer end of the air intake pipeline is connected to high-pressure gas, and an inclined plate is provided between the air intake pipeline and the flow channel of the lower valve body to facilitate changing the direction of the gas outlet.

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