Wellhead pipeline emptying-free sampling valve

Abstract

A well mouth pipeline emptying-free sampling valve comprises a valve body and a plugging assembly, a sampling pipeline is fixedly installed on the outer surface of the valve body, the sampling pipeline is communicated with the valve body, the plugging assembly is installed in the sampling pipeline, a sealing gasket is fixedly installed at the right end of the inner side of the valve body, a limiting rod is fixedly connected to the inner side face of the valve body, and the limiting rod is fixedly connected to the right end of the valve body. An observation window is arranged on the outer surface of the valve body, a graduated scale is arranged on the observation window, a sampling mechanism is arranged in the valve body, and a fixing mechanism is installed on the outer side of the valve body. By arranging the sampling mechanism, the observation window and the graduated scale, the sampling screw rod drives the sampling plate to move leftwards for sampling and move rightwards for taking out a sample from the valve body, so that the sampling device is simple and practical, the operation difficulty of workers is reduced, the sampling efficiency is improved, quantitative sampling can be performed according to observation of the sample in the valve body, and the sampling efficiency is improved. The sampling amount can be observed in time, and practicability and convenience are achieved.

Description

Technical Field

[0001] The utility model relates to the field of vent-free sampling valves, in particular to a vent-free sampling valve for a wellhead pipeline. Background Art

[0002] The vent-free sampling valve is a valve used to obtain medium samples in pipelines or equipment. In many occasions where chemical analysis of medium samples is required frequently, special sampling valves are often used. According to the working principle or performance during sampling, sampling valves are mainly divided into three types, including double-opening valves, flange clamp valves, and sampling valves with insulation jackets.

[0003] The existing vent-free sampling valve is not convenient for taking out the sample from the inside of the vent-free sampling valve during sampling, which increases the difficulty of operation for the staff, resulting in low sampling efficiency. In addition, it is difficult to control the sampling volume during sampling, and it is impossible to sample according to the required sampling volume. If less is taken, the test results will be affected, and if more is taken, it will easily cause waste, which is extremely inconvenient. Utility Model Content

[0004] In order to solve the above technical problems, a wellhead pipeline vent-free sampling valve is provided. The technical solution solves the above-mentioned problem that it is inconvenient to take out the sample from the inside of the vent-free sampling valve, which increases the operation difficulty of the staff, resulting in low sampling efficiency, and it is difficult to control the sampling volume during sampling, and sampling cannot be performed according to the required sampling volume.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A wellhead pipeline vent-free sampling valve comprises a valve body and a plugging assembly, a sampling pipeline is fixedly mounted on the outer surface of the valve body, the sampling pipeline is communicated with the valve body, the plugging assembly is mounted inside the sampling pipeline, a sealing gasket is fixedly mounted on the inner right end of the valve body, a limit rod is fixedly connected to the inner side of the valve body, an observation window is arranged on the outer surface of the valve body, a scale is arranged on the observation window, a sampling mechanism is arranged inside the valve body, and a fixing mechanism is mounted on the outer side of the valve body

[0007] Preferably, the sampling mechanism includes a sampling screw and a sampling plate, the sampling plate is threadedly connected to the sampling screw, the outer side surface of the sampling plate is tightly fitted with the inner side surface of the valve body, the sampling screw is rotatably connected to the inside of the valve body through a bearing, one end of the sampling screw extends to the inner bottom of the valve body, and the other end of the sampling screw extends to the outside of the valve body and is fixedly connected to a sampling turntable, a tooth chain is welded on the outer side of the sampling turntable, and a handle is welded on the sampling turntable.

[0008] Preferably, the sampling plate is slidably connected to the interior of the valve body via a limiting rod.

[0009] Preferably, the fixing mechanism includes a fixing ring, which is fixedly connected to the outer surface of the valve body, and the interior of the fixing ring is slidably connected to a fixed slide rod, one end of the fixed slide rod is fixedly connected to a fixed baffle, and the other end of the fixed slide rod is fixedly connected to a fixed block, and the fixed block is meshed with a tooth chain.

[0010] Preferably, a return spring is sleeved on the outer side of the fixed slide rod, and two ends of the return spring are fixedly connected to the fixed baffle and the fixed ring respectively.

[0011] Preferably, the sealing assembly includes a sealing ring and a fixed plate, both of which are fixedly connected to the inner wall of the sampling pipe, the sealing ring is located below the fixed plate, the fixed plate is slidably connected to a sealing slide rod inside, one end of the sealing slide rod is fixedly connected to the sealing plate, and the sealing plate is slidably connected to the sealing ring.

[0012] Preferably, a blocking spring is sleeved on the outer side of the blocking slide rod, and two ends of the blocking spring are fixedly connected to the fixing plate and the blocking plate respectively.

[0013] Compared with the prior art, the beneficial effects of the utility model are: by setting a sampling mechanism, an observation window and a scale, the sampling screw drives the sampling plate to move to the left for sampling, and moves to the right to take the sample out of the valve body. It is simple and practical, reduces the operating difficulty of the staff, improves the sampling efficiency, and can perform quantitative sampling based on the sample observed inside the valve body. The sampling volume can be observed in time, which is convenient for controlling the sampling volume. It is practical and convenient, and the sealing component prevents the sample from leaking out after the sampling is completed, thereby ensuring the sampling volume of the sample. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 It is a schematic diagram of the internal structure of the utility model;

[0016] Figure 3 It is a structural schematic diagram of the fixing mechanism in the utility model;

[0017] Figure 4 It is a structural schematic diagram of the blocking component in the utility model.

[0018] The numbers in the figure are:

[0019] 1. Valve body; 101. Sealing gasket; 102. Observation window; 103. Scale; 104. Sampling pipe; 105. Limit rod;

[0020] 2. Sampling mechanism; 201. Sampling screw; 202. Sampling turntable; 203. Sampling plate; 204. Tooth chain;

[0021] 3. Fixing mechanism; 301. Fixing ring; 302. Fixing slide bar; 303. Fixing block; 304. Return spring; 305. Fixing baffle;

[0022] 4. Sealing assembly; 401. Sealing ring; 402. Fixing plate; 403. Sealing slide rod; 404. Sealing plate; 405. Sealing spring. DETAILED DESCRIPTION

[0023] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art may think of other obvious variations.

[0024] Example 1

[0025] Please refer to Figure 1-4 As shown, a wellhead pipeline vent-free sampling valve includes a valve body 1 and a plugging assembly 4, a sampling pipeline 104 is fixedly installed on the outer surface of the valve body 1, the sampling pipeline 104 is connected to the valve body 1, the plugging assembly 4 is installed inside the sampling pipeline 104, a sealing gasket 101 is fixedly installed on the inner right end of the valve body 1, a limit rod 105 is fixedly connected to the inner side surface of the valve body 1, an observation window 102 is provided on the outer surface of the valve body 1, a scale 103 is provided on the observation window 102, a sampling mechanism 2 is provided inside the valve body 1, and a fixing mechanism 3 is installed on the outer side of the valve body 1.

[0026] In this solution, the sampling pipe 104 is connected to the wellhead pipe, and the sample is drawn into the interior of the valve body 1 through the sampling mechanism 2. The sampling amount is observed through the observation window 102 and the scale 103. The sampling mechanism 2 can be controlled to perform sampling according to the required sampling amount. When the sample flows into the sampling pipe 104, it enters the interior of the valve body 1 through the blocking component 4 to prevent the sample from leaking. The sampling amount can be observed in time, and sampling can be performed as needed to reduce waste.

[0027] Example 2

[0028] Please refer to Figure 2 As shown, the sampling mechanism 2 includes a sampling screw 201 and a sampling plate 203. The sampling plate 203 is threadedly connected to the sampling screw 201. The outer side of the sampling plate 203 is tightly fitted with the inner side of the valve body 1. The sampling screw 201 is rotatably connected to the inside of the valve body 1 through a bearing. One end of the sampling screw 201 extends to the inner bottom of the valve body 1, and the other end of the sampling screw 201 extends to the outside of the valve body 1 and is fixedly connected to a sampling turntable 202. A tooth chain 204 is welded to the outer side of the sampling turntable 202, and a handle is welded on the sampling turntable 202.

[0029] Please refer to Figure 2 As shown, the sampling plate 203 is slidably connected to the interior of the valve body 1 through the limiting rod 105 .

[0030] In this solution, the principle of the sampling mechanism 2 is as follows: the sampling turntable 202 is turned to drive the sampling screw 201 to rotate, and the sampling plate 203 is driven to move left and right inside the valve body 1 with the cooperation of the limit rod 105. When the sampling plate 203 moves to the left, the interior of the valve body 1 is in a negative pressure state, so that the sample is sucked into the interior of the valve body 1 through the sampling pipe 104 as needed. When the sample needs to be taken out, the sampling turntable 202 and the sampling screw 201 can be reversed to move the sampling plate 203 to the right to squeeze the sample so that it flows out through the sampling pipe 104, which is convenient for taking out the sample from the inside of the vent-free sampling valve, reducing the operating difficulty of the staff and improving the sampling efficiency of the sample.

[0031] Example 3

[0032] Please refer to Figure 1-3 As shown, the fixing mechanism 3 includes a fixing ring 301, which is fixedly connected to the outer surface of the valve body 1, and the fixing ring 301 is internally slidably connected to a fixing slide rod 302, one end of the fixing slide rod 302 is fixedly connected to a fixing baffle 305, and the other end of the fixing slide rod 302 is fixedly connected to a fixing block 303, and the fixing block 303 is meshed with the tooth chain 204.

[0033] Please refer to Figure 3 As shown, a return spring 304 is sleeved on the outer side of the fixed slide rod 302 , and two ends of the return spring 304 are fixedly connected to the fixed baffle 305 and the fixed ring 301 respectively.

[0034] In this solution, when sampling, the fixed baffle 305 is slid to the left, so that the fixed slide bar 302 drives the fixed block 303 to slide to the left, releasing the engagement state between the fixed block 303 and the tooth chain 204, so that the sampling turntable 202 can rotate. When the sampling is completed, the fixed baffle 305 is released and the fixed baffle 305 is pulled by the reset spring 304 so that the fixed slide bar 302 drives the fixed block 303 to engage with the tooth chain 204, thereby locking the sampling turntable 202 to prevent the sampling turntable 202 from rotating due to external force.

[0035] Example 4

[0036] Please refer to Figure 4As shown, the sealing assembly 4 includes a sealing ring 401 and a fixed plate 402, both of which are fixedly connected to the inner wall of the sampling pipe 104, the sealing ring 401 is located below the fixed plate 402, the fixed plate 402 is internally slidably connected with a sealing slide rod 403, one end of the sealing slide rod 403 is fixedly connected with a sealing plate 404, and the sealing plate 404 is slidably connected to the sealing ring 401.

[0037] Please refer to Figure 4 As shown, a blocking spring 405 is sleeved on the outer side of the blocking slide bar 403 , and two ends of the blocking spring 405 are fixedly connected to the fixing plate 402 and the blocking plate 404 respectively.

[0038] In this solution, the sealing plate 404 can slide inside the fixed plate 402 through the sealing slide rod 403. When extracting samples, since the interior of the valve body 1 is in a negative pressure state, the sealing slide rod 403 slides downward to make the sealing plate 404 move away from the sealing ring 401, thereby opening the channel between the sampling pipe 104 and the valve body 1, and then the sample can enter the interior of the valve body 1 through the sampling pipe 104. After the sampling is completed, the sealing plate 404 is pulled back to its original position by the sealing spring 405, so that it moves to the middle part of the sealing ring 401, and closes the channel between the sampling pipe 104 and the valve body 1. When the sample is taken out from the interior of the valve body 1, the interior of the valve body 1 is in a pressurized state, thereby pushing the sealing plate 404 to move upward, opening the channel between the sampling pipe 104 and the valve body 1, and then taking out the sample.

[0039] The working principle and use process of the utility model: when the utility model is in use, the sampling pipe 104 is connected to the wellhead pipe, and the handle is turned to make the sampling turntable 202 drive the sampling screw 201 to rotate, and the sampling plate 203 is driven to move left and right inside the valve body 1 with the cooperation of the limit rod 105. When the sampling plate 203 moves to the left, the interior of the valve body 1 is in a negative pressure state, and the sampling amount is observed through the observation window 102 and the scale 103, so that the sample is sucked into the interior of the valve body 1 through the sampling pipe 104 as needed. When taking out the sample, the sampling turntable 202 and the sampling screw 201 are reversed, so that the sampling plate 203 moves to the right to pressurize the sample, so that it flows out through the sampling pipe 104, which is convenient for taking out the sample from the interior of the vent-free sampling valve, reducing the operating difficulty of the staff and improving the sampling efficiency of the sample.

[0040] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and the specification only describe the principles of the utility model. The utility model may be subject to various changes and improvements without departing from the spirit and scope of the utility model. These changes and improvements fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A wellhead pipeline vent-free sampling valve, characterized in that: The invention comprises a valve body (1) and a plugging assembly (4); a sampling pipe (104) is fixedly mounted on the outer surface of the valve body (1); the sampling pipe (104) is communicated with the valve body (1); the plugging assembly (4) is mounted inside the sampling pipe (104); a sealing gasket (101) is fixedly mounted on the right inner end of the valve body (1); a limit rod (105) is fixedly connected to the inner side surface of the valve body (1); an observation window (102) is arranged on the outer surface of the valve body (1); a scale (103) is arranged on the observation window (102); a sampling mechanism (2) is arranged inside the valve body (1); and a fixing mechanism (3) is mounted on the outer side of the valve body (1).

2. A wellhead pipeline vent-free sampling valve according to claim 1, characterized in that: The sampling mechanism (2) comprises a sampling screw (201) and a sampling plate (203), wherein the sampling plate (203) is threadedly connected to the sampling screw (201), the outer side surface of the sampling plate (203) is tightly fitted with the inner side surface of the valve body (1), the sampling screw (201) is rotatably connected to the inside of the valve body (1) via a bearing, one end of the sampling screw (201) extends to the inner bottom of the valve body (1), and the other end of the sampling screw (201) extends to the outside of the valve body (1) and is fixedly connected to a sampling turntable (202), the outer side surface of the sampling turntable (202) is welded with a tooth chain (204), and a handle is welded on the sampling turntable (202).

3. A wellhead pipeline vent-free sampling valve according to claim 2, characterized in that: The sampling plate (203) is slidably connected to the interior of the valve body (1) via a limiting rod (105).

4. A wellhead pipeline vent-free sampling valve according to claim 1, characterized in that: The fixing mechanism (3) comprises a fixing ring (301), wherein the fixing ring (301) is fixedly connected to the outer surface of the valve body (1), and the fixing ring (301) is slidably connected to a fixing slide rod (302) inside, and one end of the fixing slide rod (302) is fixedly connected to a fixing baffle (305), and the other end of the fixing slide rod (302) is fixedly connected to a fixing block (303), and the fixing block (303) is meshed with a toothed chain (204).

5. A wellhead pipeline vent-free sampling valve according to claim 4, characterized in that: A return spring (304) is sleeved on the outer side of the fixed slide rod (302), and two ends of the return spring (304) are fixedly connected to the fixed baffle (305) and the fixed ring (301) respectively.

6. A wellhead pipeline vent-free sampling valve according to claim 1, characterized in that: The blocking assembly (4) comprises a blocking ring (401) and a fixed plate (402), wherein the blocking ring (401) and the fixed plate (402) are both fixedly connected to the inner wall of the sampling pipe (104), the blocking ring (401) is located below the fixed plate (402), a blocking slide bar (403) is slidably connected inside the fixed plate (402), one end of the blocking slide bar (403) is fixedly connected to a blocking plate (404), and the blocking plate (404) is slidably connected to the blocking ring (401).

7. A wellhead pipeline vent-free sampling valve according to claim 6, characterized in that: A blocking spring (405) is sleeved on the outer side of the blocking slide bar (403), and two ends of the blocking spring (405) are fixedly connected to the fixing plate (402) and the blocking plate (404) respectively.

Images