Push-to-connect pipe sampling valve

Abstract

The utility model provides a kind of press type pipeline sampling valve, including valve body, valve seat, valve stem, sealing packing and valve stem drive structure, wherein, valve seat is connected in the below of valve body and it is provided with sample outlet passage thereon, valve stem passes through the valve body from top to bottom and extends into the medium passage in valve body, natural state, valve stem is blocked under the action of spring The sample outlet passage, when pressing pressure rod, valve stem can open the sample outlet passage on valve seat under the drive of valve stem drive structure. The press type pipeline sampling valve provided by the utility model is reasonable in structure, and the switch responds quickly, which can avoid the residue and condensation of the sample in the sampling pipeline.

Description

Technical Field

[0001] This utility model relates to the field of pipeline sampling technology, and in particular provides a press-type pipeline sampling valve. Background Technology

[0002] Pipeline sampling is a core step in industrial production (such as petroleum, chemical, pharmaceutical, and water conservancy industries) to extract representative samples from pipelines transporting media. The core purpose is to accurately control media quality, monitor production processes, or identify pipeline operational risks through sample analysis, preventing product defects, equipment damage, or safety accidents caused by abnormal media. Early industries lacked sampling control technology, and sampling was conducted using simple tools (such as ordinary ball valves, sampling bottles, and manual samplers) to manually open valves at specific points in the pipeline (often pre-existing interfaces in the pipeline wall) to collect samples, which were then sent to the laboratory for analysis. The following problems easily occurred during sampling: 1. There is a distance between the sampling point and the sampling valve, which can easily cause sample residue. If the residue is discharged directly before sampling, it will pollute the environment and air. For materials that easily polymerize or crystallize after cooling, the residue can also cause blockage in the sampling pipeline; 2. Sampling valves are mostly opened with rotary handles, which have slow opening and closing speeds, making the sample volume uncontrollable and prone to leakage.

[0003] Therefore, designing a pipeline sampling valve with a reasonable structure, quick opening and closing capability, and effective prevention of sample residue and blockage in the sampling pipeline has become an urgent problem to be solved. Utility Model Content

[0004] In view of this, the present invention provides a press-type pipeline sampling valve to solve at least one of the problems of slow opening and closing of traditional pipeline sampling valves, sample residue in the sampling pipeline, and clogging.

[0005] This utility model provides a press-type pipeline sampling valve, comprising: a valve body, a valve seat, a valve stem, sealing packing, and a valve stem drive structure. The valve body has connecting flanges at both ends, and a medium channel connecting the two connecting flanges is formed within the valve body. A receiving cavity is formed at the upper part of the valve body, and a valve body cover is fixedly connected to the top of the valve body. The valve seat is connected to the lower part of the valve body and has a sampling channel on it. The lower end of the valve stem passes through the valve body cover, the receiving cavity, and the valve body sequentially from top to bottom and extends into the medium channel to block / open the sampling channel. The sealing packing is sealed and pressed into the receiving cavity by the valve body cover. The valve stem drive structure... The structure is located above the valve body cover. The valve stem drive structure includes a lower spring support, a top spring cover, a spring, a linkage head, and a pressure rod. The lower spring support is fixed to the outer periphery of the valve stem. The top spring cover is spaced apart and fixedly located above the lower spring support. The spring is pressed between the lower spring support and the top spring cover. The linkage head is located below the lower spring support and connected to the pressure rod. It is used to push the lower spring support upward under the action of the pressure rod to overcome the elastic force of the spring and drive the valve stem upward, thereby opening the sample outlet channel. In the natural state, the spring pushes the lower spring support and drives the valve stem downward under the action of the restoring force, thereby blocking the sample outlet channel.

[0006] Preferably, the valve seat and the valve body are an integral structure, or the valve seat is threadedly connected to the lower part of the valve body.

[0007] Further preferably, the inner side of the valve seat is provided with an internal thread that mates with the mouth of the sampling bottle.

[0008] More preferably, the valve seat is threaded to the lower part of the valve body, and the valve seat is a polytetrafluoroethylene (PTFE) valve seat.

[0009] In a further preferred embodiment, the lower part of the valve body is threadedly connected to a sampling bottle mounting seat, the inner side of which is provided with an internal thread that mates with the mouth of the sampling bottle, and the sampling bottle mounting seat is located below the valve seat.

[0010] In a further preferred embodiment, a hollow housing is fixedly installed above the valve body cover, and both the spring top cover and the spring are disposed inside the housing, with the spring top cover being fixedly connected to the housing.

[0011] In a further preferred embodiment, a limiting beam is provided on the housing, and the linkage head is limited and installed below the lower spring support through a slot that cooperates with the limiting beam.

[0012] More preferably, the lower spring support is threadedly connected to the valve stem.

[0013] Further preferably, the spring top cover is provided with a through hole that mates with the valve stem, and the press-type pipeline sampling valve also includes a safety locking structure, which includes a locking nut and a nut mounting seat. The nut mounting seat is fixedly disposed above the spring top cover, and the locking nut is threaded onto the nut mounting seat to limit the height of the valve stem extending out of the spring top cover.

[0014] The push-button pipeline sampling valve provided by this utility model can control the raising and lowering of the valve stem through a valve stem drive structure, thereby blocking / opening the sample outlet channel and realizing the opening and closing of the sampling valve. The sampling valve has a fast opening and closing response speed, which can reduce the risk of leakage. Pressing the pressure rod opens the valve, and releasing the pressure rod causes the spring to automatically drive the valve stem to close the valve. In addition, the sampling point does not need to pass through the sampling pipeline to reach the sampling valve, effectively avoiding sample residue and pipeline blockage in the sampling pipeline. The valve stem and valve seat are sealed by a mating plug-in connection, and there is no rotation between the two, which can effectively avoid wear. Attached Figure Description

[0015] Figure 1 A schematic diagram of the push-type pipeline sampling valve provided by this utility model; Figure 2 This is a cross-sectional view of the push-button pipeline sampling valve provided by this utility model. Detailed Implementation

[0016] The present invention will be further described below with reference to specific embodiments.

[0017] To address the slow opening and closing response of traditional pipeline sampling valves, such as Figure 1 , Figure 2As shown, this utility model provides a press-type pipeline sampling valve, including: a valve body 1, a valve seat 2, a valve stem 3, a sealing packing 4, and a valve stem drive structure. The valve body 1 has connecting flanges 11 at both ends, and a medium channel 12 connecting the two connecting flanges 11 is provided inside the valve body 1. A receiving cavity is provided at the upper part of the valve body 1, and a valve body cover 13 is fixedly connected to the top of the valve body 1. The valve seat 2 is connected to the lower part of the valve body 1 and has a sampling channel 21 on it. The lower end of the valve stem 3 passes through the valve body cover 13, the receiving cavity, and the valve body 1 from top to bottom and extends into the medium channel 12 to seal / open the sampling channel 21. The sealing packing 4 is sealed and pressed into the receiving cavity by the valve body cover 13 to prevent fluid leakage from the medium channel. The valve stem... The drive structure is located above the valve body cover 13. The valve stem drive structure includes a lower spring support 51, a top spring cover 52, a spring 53, a linkage head 54, and a pressure rod 55. The lower spring support 51 is fixed to the outer periphery of the valve stem 3. The top spring cover 52 is spaced apart and fixedly located above the lower spring support 51. The spring 53 is pressed between the lower spring support 51 and the top spring cover 52. The linkage head 54 is located below the lower spring support 51 and connected to the pressure rod 55. It is used to push the lower spring support 51 upward under the action of the pressure rod 55 to overcome the elastic force of the spring 53 and drive the valve stem 3 upward, thereby opening the sample outlet channel 21. In the natural state, the spring 53 pushes the lower spring support 51 under the action of restoring force, thereby driving the valve stem 3 downward, thereby blocking the sample outlet channel 21.

[0018] This push-button pipeline sampling valve uses a valve stem drive structure to control the raising and lowering of the valve stem, thereby blocking / opening the sample outlet channel (i.e., isolating or connecting the sample outlet channel with the medium channel), thus realizing the opening and closing of the sampling valve. The sampling valve has a fast opening and closing response speed, which can reduce the risk of leakage. Pressing the pressure rod opens the valve, and releasing the pressure rod causes the spring to automatically push the valve stem and close the valve. In addition, the sampling point does not need to pass through the internal sampling pipeline to reach the sampling valve, effectively avoiding sample residue and pipeline blockage in the sampling pipeline.

[0019] As an improvement to the technical solution, the valve seat 2 and the valve body 1 are an integral structure, or the valve seat 2 is threadedly connected to the lower part of the valve body 1.

[0020] As an improvement to the technical solution, the inner side of the valve seat 2 is provided with an internal thread that matches the mouth of the sampling bottle 6, which facilitates fixing the sampling bottle during sampling.

[0021] As an improvement to the technical solution, the valve seat 2 is threaded to the bottom of the valve body 1. The valve seat 2 is a polytetrafluoroethylene valve seat, and the valve stem is a stainless steel valve stem. When the two come into contact, the soft material touching the hard material is more conducive to sealing.

[0022] To facilitate installation on different types of sampling bottles, as an improvement to the technical solution, a sampling bottle mounting base 7 is threadedly connected to the lower part of the valve body 1. The inner side of the sampling bottle mounting base 7 is provided with an internal thread that mates with the mouth of the sampling bottle 6. The sampling bottle mounting base 7 is located below the valve seat 2. By replacing the sampling bottle mounting base with one suitable for the sampling bottle, different sampling bottles can be accommodated. Preferably, such as… Figure 2 As shown, the lower end of the sampling channel 21 extends into the sampling bottle 6.

[0023] As an improvement to the technical solution, such as Figure 1 , Figure 2 As shown, a hollow housing 8 is fixedly installed above the valve body cover 13. The spring top cover 52 and the spring 53 are both disposed inside the housing 8. The spring top cover 52 is fixedly connected to the housing 8. The housing can prevent the spring from being exposed and ensure the reliability of the structure.

[0024] As an improvement to the technical solution, such as Figure 2 As shown, a limiting beam 81 is provided on the housing 8, and the linkage head 54 is limited and installed below the spring support 51 through a slot 541 that cooperates with the limiting beam 81.

[0025] As an improvement to the technical solution, such as Figure 2 As shown, the lower spring support 51 is threadedly connected to the valve stem 3. Preferably, the valve stem 3 is provided with a limiting edge that cooperates with the lower spring support 51 to ensure the stability of the lower spring support.

[0026] As an improvement to the technical solution, such as Figure 1 , Figure 2 As shown, the spring top cover 52 is provided with a through hole that mates with the valve stem 3. The push-type pipeline sampling valve also includes a safety locking structure, which includes a locking nut 91 and a nut mounting seat 92. The nut mounting seat 92 is fixedly disposed above the spring top cover 52. The locking nut 91 is threaded onto the nut mounting seat 92 to limit the height of the valve stem 3 extending out of the spring top cover 52. When not sampling, tightening the locking nut so that it abuts against the valve can prevent accidental operation of the push rod.

[0027] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A press-type pipeline sampling valve, characterized in that, include: The valve body (1), valve seat (2), valve stem (3), sealing packing (4), and valve stem drive structure are provided. The valve body (1) has connecting flanges (11) at both ends. A medium channel (12) connecting the two connecting flanges (11) is provided inside the valve body (1). A receiving cavity is provided at the upper part of the valve body (1). A valve body cover (13) is fixedly connected to the top of the valve body (1). The valve seat (2) is connected to the lower part of the valve body (1) and has a sample outlet channel (21) on it. The lower end of the valve stem (3) passes through the valve body cover (13), the receiving cavity, and the valve body (1) from top to bottom and extends into the medium channel (12) to block / open the sample outlet channel (21). The sealing packing (4) is sealed and pressed into the receiving cavity by the valve body cover (13). The valve stem drive structure is located above the valve body cover (13). The rod drive structure includes a spring lower support (51), a spring top cover (52), a spring (53), a linkage head (54), and a pressure rod (55). The spring lower support (51) is fixed to the outer periphery of the valve stem (3). The spring top cover (52) is spaced apart and fixedly disposed above the spring lower support (51). The spring (53) is pressed between the spring lower support (51) and the spring top cover (52). The linkage head (54) is disposed below the spring lower support (51) and connected to the pressure rod (55). It is used to push the spring lower support (51) upward under the drive of the pressure rod (55) to overcome the elastic force of the spring (53) and drive the valve stem (3) to move upward, thereby opening the sample outlet channel (21). In the natural state, the spring (53) pushes the spring lower support (51) under the action of restoring force to drive the valve stem (3) downward, thereby blocking the sample outlet channel (21).

2. The press-type pipeline sampling valve according to claim 1, characterized in that, The valve seat (2) and the valve body (1) are an integral structure or the valve seat (2) is threaded to the bottom of the valve body (1).

3. The press-type pipeline sampling valve according to claim 1, characterized in that, The valve seat (2) has an internal thread on its inner side that mates with the mouth of the sampling bottle (6).

4. The press-type pipeline sampling valve according to claim 1, characterized in that, The valve seat (2) is threaded to the bottom of the valve body (1), and the valve seat (2) is a polytetrafluoroethylene valve seat.

5. The press-type pipeline sampling valve according to claim 1, characterized in that, The lower part of the valve body (1) is threadedly connected to a sampling bottle mounting seat (7). The inner side of the sampling bottle mounting seat (7) is provided with an internal thread that matches the bottle mouth of the sampling bottle (6). The sampling bottle mounting seat (7) is located below the valve seat (2).

6. The press-type pipeline sampling valve according to claim 1, characterized in that, A hollow housing (8) is fixedly installed above the valve body cover (13). The spring top cover (52) and the spring (53) are both located inside the housing (8). The spring top cover (52) is fixedly connected to the housing (8).

7. The press-type pipeline sampling valve according to claim 6, characterized in that, A limiting beam (81) is provided on the housing (8), and the linkage head (54) is limited and installed below the spring support (51) through a slot (541) that cooperates with the limiting beam (81).

8. The press-type pipeline sampling valve according to claim 1, characterized in that, The spring support (51) is threadedly connected to the valve stem (3).

9. The press-type pipeline sampling valve according to claim 1, characterized in that, The spring top cover (52) is provided with a through hole that mates with the valve stem (3). The press-type pipeline sampling valve also includes a safety locking structure, which includes a locking nut (91) and a nut mounting seat (92). The nut mounting seat (92) is fixedly disposed above the spring top cover (52). The locking nut (91) is threaded onto the nut mounting seat (92) to limit the height of the valve stem (3) extending out of the spring top cover (52).

Images