Sampling valve

Abstract

The utility model belongs to the technical field of sampling valves, and particularly relates to a sampling valve which comprises a valve body and valve seats, the inner side of the valve body is connected with the outer sides of the valve seats, a valve ball is in butt joint between the two valve seats, the valve ball is movably connected with the valve body through a bearing, and the sides, away from the valve ball, of the valve seats are provided with first sealing rings in a matched mode. According to the sampling valve, the double-end pipe is in threaded connection with a pipeline or a container, then the first butt-joint pipe is in rotary butt joint with one end of the double-end pipe, and at the moment, the valve body can be in rotary butt joint with the external threads of the first butt-joint pipe, so that the first butt-joint pipe and the second sealing ring form a sealing state; and the double-end pipe and the sealing ring I of the valve seat close to the butting pipe I form a sealing state, so that a double-sealing structure is formed, the risk of environmental pollution or equipment damage caused by leakage is reduced, the maintenance and repair frequency and cost of the sampling valve are reduced, the sampling valve is convenient for stable sampling, fluid leakage is prevented, and the sealing performance is improved.

Description

Technical Field

[0001] This utility model relates to the field of sampling valve technology, specifically a sampling valve. Background Technology

[0002] A sampling valve is a device used to extract liquid or gas samples from pipes or containers. Sampling valves are usually installed in industrial piping systems to facilitate product quality testing, analysis and monitoring by staff. Sampling valves can ensure the representativeness and accuracy of samples. They are commonly used in industries such as chemical, pharmaceutical and food. Sampling valves can prevent sample leakage or external contamination and can quickly obtain samples, reducing the impact on the production process.

[0003] Sampling valves can safely and conveniently extract representative samples from fluid systems for analysis and testing. The flow rate of the sampling valve can be adjusted to obtain the required amount of sample. However, since the sampling valve is generally connected to the pipeline or container through a single threaded pipe, there is usually only one sealing structure between the sampling valve and the pipeline or container, which limits the sealing performance of the sampling valve. Therefore, we propose a sampling valve. Utility Model Content

[0004] The purpose of this utility model is to provide a sampling valve to solve the problem mentioned in the background art that when the sampling valve is connected to a pipeline or container, there is generally only one sealing structure between the sampling valve and the pipeline or container, which results in limited sealing performance of the sampling valve.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a sampling valve, comprising a valve body and a valve seat, wherein the inner side of the valve body is connected to the outer side of the valve seat, a valve ball is mated between the two valve seats, the valve ball is movably connected to the valve body via a bearing, a sealing ring one is fitted on the side of the valve seat away from the valve ball, a sealing ring two is fitted on one side of the valve body, and a connecting pipe one is mated at the end of the valve body near the sealing ring two, the connecting pipe one has an external thread on the side near the valve body, internal threads are respectively provided at both ends of the valve body, and an internal thread is provided at the end of the connecting pipe one away from the valve body.

[0006] Preferably, the internal thread of the connecting pipe 1 is connected to the double-ended pipe, and the two ends of the double-ended pipe are respectively provided with external threads.

[0007] Preferably, the valve body is connected to a connecting pipe 2 at the end away from the double-ended pipe, and the connecting pipe 2 is provided with an external thread at the end near the valve body.

[0008] Preferably, a sample outlet tube is fixed at the end of the connecting pipe two away from the valve body, and a groove is provided on the lower side of the valve ball.

[0009] Preferably, a valve stem is provided below the valve ball, and a locking block is fixed at the upper end of the valve stem.

[0010] Preferably, the locking block is connected to the locking groove, a sealing ring one and a sealing ring two are sequentially sleeved on the outer side of the valve stem, the lower end of the valve stem is connected to the inner side of the handle, and the handle is movably connected to the lower end of the valve body through a bearing.

[0011] Preferably, the first sealing ring, the second sealing ring, the first sealing ring, and the second sealing ring are all made of silicone material, and the first sealing ring and the second sealing ring are pressed against the inner side of the valve body.

[0012] Preferably, the internal thread at one end of the valve body is threadedly connected to the external thread of the first connecting pipe, and the internal thread at the other end of the valve body is threadedly connected to the external thread of the second connecting pipe, and the internal thread of the first connecting pipe is threadedly connected to the external thread of the double-ended pipe.

[0013] Preferably, the slot and the block are engaged in a locking connection, and the lower end of the valve stem is engaged in a locking connection with the inner side of the handle.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: This sampling valve connects the double-ended pipe to the pipeline or container by thread, and then rotates and connects the first end of the connecting pipe to one end of the double-ended pipe. At this time, the valve body can be rotated and connected to the external thread of the first connecting pipe, so that the first connecting pipe and the second sealing ring form a sealing state, and the double-ended pipe and the valve seat near the first sealing ring of the first connecting pipe form a sealing state, thereby forming a double sealing structure. This reduces the risk of environmental pollution or equipment damage caused by leakage, reduces the frequency and cost of maintenance and repair of the sampling valve, makes the sampling valve easy to sample stably, prevents fluid leakage and improves sealing performance. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the valve body and handle of this utility model;

[0016] Figure 2 This is a schematic diagram of the valve body, valve seat and their connection structure of this utility model;

[0017] Figure 3 This is a schematic diagram of the butt joint pipe, the double-ended pipe and their connection structure of this utility model.

[0018] In the diagram: 1. Valve body; 101. Valve seat; 1011. Sealing ring one; 102. Valve ball; 103. Sealing ring two; 104. Connecting pipe one; 105. Double-ended pipe; 106. Connecting pipe two; 107. Sample outlet pipe; 2. Slot; 201. Valve stem; 2011. Locking block; 202. Sealing ring one; 203. Sealing ring two; 204. Handle. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Please see Figures 1-3 This utility model provides a technical solution: a sampling valve, including a valve body 1 and a valve seat 101. The inner side of the valve body 1 is connected to the outer side of the valve seat 101. A valve ball 102 is mated between the two valve seats 101. The valve ball 102 is movably connected to the valve body 1 via a bearing. A sealing ring 1011 is fitted on the side of the valve seat 101 away from the valve ball 102, and a sealing ring 103 is fitted on one side of the valve body 1. A connecting pipe 104 is mated at the end of the valve body 1 near the sealing ring 103. 04. An external thread is provided on the side near the valve body 1, and internal threads are provided at both ends of the valve body 1. An internal thread is provided at the end of the connecting pipe 104 away from the valve body 1. The internal thread of the connecting pipe 104 is aligned with the double-ended pipe 105, and both ends of the double-ended pipe 105 are provided with external threads. A connecting pipe 2 106 is connected to the end of the valve body 1 away from the double-ended pipe 105, and an external thread is provided at the end of the connecting pipe 2 106 near the valve body 1. A sample outlet pipe 1 is fixed to the end of the connecting pipe 2 106 away from the valve body 1. 07. A groove 2 is provided on the lower side of the valve ball 102. A valve stem 201 is provided below the valve ball 102. A locking block 2011 is fixed at the upper end of the valve stem 201. The locking block 2011 is in contact with the groove 2. A sealing ring 1 202 and a sealing ring 203 are sequentially sleeved on the outer side of the valve stem 201. The lower end of the valve stem 201 is in contact with the inner side of the handle 204. The handle 204 is movably connected to the lower end of the valve body 1 through a bearing. The sealing ring 1 1011, sealing ring 2 103, sealing ring 1 202 and... The sealing ring 203 is made of silicone. The sealing ring 202 and the sealing ring 203 are pressed against the inner side of the valve body 1. The internal thread of one end of the valve body 1 is threadedly connected to the external thread of the connecting pipe 104, and the internal thread of the other end of the valve body 1 is threadedly connected to the external thread of the connecting pipe 206. The internal thread of the connecting pipe 104 is threadedly connected to the external thread of the double-ended pipe 105. The slot 2 and the locking block 2011 are engaged and connected. The lower end of the valve stem 201 is engaged and connected to the inner side of the handle 204.

[0021] In specific implementation, according to Figures 1-3When connecting the sampling valve to a pipeline or container, first thread the double-ended pipe 105 to the pipeline or container. Then, rotate the connecting pipe 104 to one end of the double-ended pipe 105, connecting them together by the internal thread of the connecting pipe 104 and the external thread of the double-ended pipe 105. This confines the connecting pipe 104 and the double-ended pipe 105 together. At this point, rotate the valve body 1 to the external thread of the connecting pipe 104, connecting it together by the internal thread of one end of the valve body 1 and the external thread of the connecting pipe 104. The connectors 104 and 105 are confined together, and at this time, the connector 104 and the sealing ring 103 are compressed. The double-ended tube 105 and the valve seat 101 are compressed near the sealing ring 1011 of the connector 104. Since the sealing rings 1011 and 103 are made of silicone, the connector 104 and the sealing ring 103 are sealed together, and the double-ended tube 105 and the valve seat 101 are also sealed near the sealing ring 1011 of the connector 104. This forms a double sealing structure, reducing environmental damage caused by leakage. To reduce the risk of contamination or equipment damage, and decrease the frequency and cost of maintenance and repair of the sampling valve, the connecting pipe 2 106 is rotated and connected to the internal thread of the other end of the valve body 1. The internal thread of the other end of the valve body 1 is threadedly connected to the external thread of the connecting pipe 2 106, thus confining the valve body 1 and the connecting pipe 2 106 together. Simultaneously, the connecting pipe 2 106 and the valve seat 101 are compressed away from the sealing ring 1011 of the connecting pipe 1 104. The sealing ring 1011, made of silicone, keeps the connecting pipe 2 106 and the valve seat 101 away from the connecting pipe 1 104. The sealing ring 1011 of 04 forms a sealing state, thereby restricting the valve body 1 to the sample outlet tube 107. At this time, rotating the handle 204 causes the lower end of the valve stem 201 to engage with the inner side of the handle 204, so that the handle 204 can stably drive the valve stem 201 to rotate. Furthermore, the handle 204 engages with the locking block 2011 through the locking groove 2, allowing the valve stem 201 to stably drive the valve ball 102 to rotate. This allows the fluid to be discharged through the sample outlet tube 107, making the sampling valve easy to sample stably, preventing fluid leakage and improving sealing performance.

[0022] In summary, when connecting the sampling valve to a pipeline or container, first connect the double-ended pipe 105 to the pipeline or container via threads. Then, rotate the connecting pipe 104 to one end of the double-ended pipe 105. At this point, the valve body 1 can be rotated to connect with the external threads of the connecting pipe 104, thus confining the valve body 1 and the connecting pipe 104 together. This creates a seal between the connecting pipe 104 and the sealing ring 103, and also creates a seal between the double-ended pipe 105 and the valve seat 101 near the sealing ring 1011 of the connecting pipe 104. This forms a double sealing structure. Then, the inner thread of the second connecting pipe 106 is rotated and connected to the other end of the valve body 1, so that the second connecting pipe 106 and the valve seat 101 are in a sealed state away from the sealing ring 1011 of the first connecting pipe 104. This allows the valve stem 201 to stably drive the valve ball 102 to rotate, so that the fluid can be discharged through the sample outlet pipe 107. This makes it easy for the sampling valve to take stable samples, prevents fluid leakage and improves sealing performance. The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0023] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A sampling valve, comprising a valve body (1) and a valve seat (101), characterized in that: The inner side of the valve body (1) is connected to the outer side of the valve seat (101). A valve ball (102) is mated between the two valve seats (101). The valve ball (102) is movably connected to the valve body (1) through a bearing. A sealing ring one (1011) is fitted on the side of the valve seat (101) away from the valve ball (102). A sealing ring two (103) is fitted on one side of the valve body (1). A connecting pipe one (104) is mated on the end of the valve body (1) near the sealing ring two (103). An external thread is provided on the side of the connecting pipe one (104) near the valve body (1). Internal threads are provided at both ends of the valve body (1). An internal thread is provided at the end of the connecting pipe one (104) away from the valve body (1).

2. A sampling valve according to claim 1, characterized in that: The internal thread of the connecting pipe 1 (104) is connected to the double-ended pipe (105), and the two ends of the double-ended pipe (105) are respectively provided with external threads.

3. A sampling valve according to claim 1, characterized in that: The valve body (1) is connected to a connecting pipe 2 (106) at the end away from the double-ended pipe (105), and the connecting pipe 2 (106) is provided with an external thread at the end near the valve body (1).

4. A sampling valve according to claim 3, characterized in that: The end of the connecting pipe 2 (106) away from the valve body (1) is fixed with a sample outlet pipe (107), and a groove (2) is provided on the lower side of the valve ball (102).

5. A sampling valve according to claim 1, characterized in that: A valve stem (201) is provided below the valve ball (102), and a locking block (2011) is fixed at the upper end of the valve stem (201).

6. A sampling valve according to claim 5, characterized in that: The locking block (2011) is connected to the locking groove (2). The outer side of the valve stem (201) is fitted with a sealing ring one (202) and a sealing ring two (203) in sequence. The lower end of the valve stem (201) is connected to the inner side of the handle (204), and the handle (204) is movably connected to the lower end of the valve body (1) through a bearing.

7. A sampling valve according to claim 1, characterized in that: The sealing ring 1 (1011), sealing ring 2 (103), sealing ring 1 (202) and sealing ring 2 (203) are made of silicone material, and the sealing ring 1 (202) and sealing ring 2 (203) are pressed against the inner side of the valve body (1).

8. A sampling valve according to claim 1, characterized in that: The internal thread at one end of the valve body (1) is threadedly connected to the external thread of the first connecting pipe (104), and the internal thread at the other end of the valve body (1) is threadedly connected to the external thread of the second connecting pipe (106). The internal thread of the first connecting pipe (104) is threadedly connected to the external thread of the double-ended pipe (105).

9. A sampling valve according to claim 6, characterized in that: The slot (2) engages with the block (2011), and the lower end of the valve stem (201) engages with the inner side of the handle (204).

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