Plunger type sampling valve

Abstract

The utility model provides a plunger type sampling valve which comprises a valve body and a sampling pipe, one side of the valve body is communicated and connected with the sampling pipe, a plunger is connected in the valve body in a sliding mode, one end of the plunger is fixedly connected with a connecting column, a rubber plug is arranged on the periphery of the connecting column, a threaded groove is formed between the connecting column and the rubber plug, and the threaded groove is communicated with the sampling pipe. A fixing screw is in threaded connection with the interior of the rubber plug, the other end of the fixing screw is located in the connecting column, a sealing ring is fixedly arranged on the outer side wall of the plunger, filler is arranged in one end of the valve body, a filler pressing plate is arranged at the bottom end of the filler, and a protective sleeve is fixedly connected to one end of the valve body. And a valve rod is arranged in the protective sleeve. According to the sampling valve, the design is novel, the structure is simple, the interior of the valve body has a relatively strong sealing effect, so that the working efficiency of the sampling valve can be improved, materials in the device are not easy to leak into the valve body, the normal work of the sampling valve is prevented from being influenced, and the sampling valve is relatively practical.

Description

Technical Field

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

[0002] The plunger sampling valve is a special valve suitable for sampling reactors or pipelines in crystallization conditions and is widely used in the field of chemical production.

[0003] When the existing sampling valve is working, the sealing performance of the valve body is poor, so the material inside the device cannot be sampled well. When the feed port is closed, it does not have a good sealing effect, so the material inside the device is more likely to leak into the valve body, which is easy to form scars inside the valve body, seriously affecting the normal operation of the plunger. It can no longer meet people's needs. For this reason, we propose a plunger sampling valve. Utility Model Content

[0004] The technical problem solved by the present invention is to provide a plunger-type sampling valve with novel design and simple structure, which makes the interior of the valve body have a strong sealing effect, thereby improving the working efficiency of the sampling valve itself, and is not easy for the material inside the device to leak into the interior of the valve body, avoiding affecting the normal operation of the sampling valve. It is more practical and solves the problems raised in the above-mentioned background technology.

[0005] The technical problem solved by the present invention is achieved by the following technical solutions:

[0006] A plunger-type sampling valve comprises a valve body and a sampling tube, wherein a sampling tube is conductively connected to one side of the valve body, a plunger is slidably connected to the inside of the valve body, one end of the plunger is fixedly connected to a connecting column, a rubber plug is arranged on the periphery of the connecting column, a threaded groove is arranged between the connecting column and the rubber plug, a fixing screw is threadedly connected to the inside of the rubber plug, and the other end of the fixing screw is located inside the connecting column, a sealing ring is fixedly arranged on the outer wall of the plunger, a packing is arranged inside one end of the valve body, a packing pressure plate is arranged at the bottom end of the packing, a protective sleeve is fixedly connected to one end of the valve body, a valve stem is arranged inside the protective sleeve, and one end of the valve stem is fixedly connected to the plunger, an anti-rotation plate is fixedly connected to the periphery of one end of the valve stem, and a sliding groove is fixedly provided on the inner wall of the protective sleeve.

[0007] Furthermore, the outer periphery of the other end of the valve stem is threadedly connected to a threaded sleeve, the outer periphery of the threaded sleeve is fixedly connected to a bearing, and the bearing is fixedly connected to the inner wall of the protective sleeve, and the outer periphery of one end of the threaded sleeve is fixedly connected to a handwheel.

[0008] Furthermore, a flange is fixedly connected to the periphery of the other end of the valve body, a feed port is fixedly provided at the other end of the valve body, and a sampling port is arranged at the other end of the sampling tube.

[0009] Furthermore, the rubber plug is threadedly connected to the connecting column through a threaded groove, the packing pressure plate and the protective sleeve are fixedly connected to the valve body through external screws, and the anti-rotation plate is slidably connected to the protective sleeve through a sliding groove.

[0010] Furthermore, the sealing ring is a Glyd ring sealing ring, and the sealing rings are divided into several groups, and the outer periphery of the valve stem is fixedly provided with an external thread.

[0011] Compared with the prior art, the beneficial effects of the present invention are:

[0012] 1. A sealing ring made of a Glyd ring is arranged on the periphery of the plunger, which has a good sealing effect on the inside of the valve body. Therefore, when the plunger moves, the material inside the device can be extracted. The sealing ring made of the Glyd ring has a strong sealing effect. At the same time, its own friction is small and will not affect the movement of the plunger. The packing can effectively improve the sealing effect of one end of the valve body, thereby increasing the working efficiency of the sampling valve. The packing pressure plate can press the packing well, making it less likely to loosen, which is more practical.

[0013] 2. The rubber plug can achieve a good sealing effect on the feed port, so that the material inside the device is not easy to enter the valve body, to prevent the material from leaking into the valve body and causing scarring inside the valve body, thereby avoiding affecting the next movement of the plunger, which is more practical.

[0014] 3. The threaded groove makes it easy to fix the rubber plug, and the limit screw can well limit the position of the rubber plug, so that it is not easy to loosen after long-term work, so as to avoid affecting the sealing effect at the feed port. The combination of the anti-rotation plate and the sliding groove can effectively prevent the valve stem from rotating, so as to avoid affecting the sealing performance of the sampling valve itself. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0016] Figure 2 This is an enlarged view of the structure of part I of the present utility model. DETAILED DESCRIPTION

[0017] 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.

[0018] like Figures 1-2As shown, during operation, the flange 18 can be flange-connected to an external device, so that the sampling valve can work stably. When the staff needs to take samples, they can turn the hand wheel 17 left and right to drive the threaded sleeve 15 to rotate around the valve stem 12, so that the valve stem 12 can drive the plunger 3 to move inside the valve body 1, wherein the plunger 3 is provided with a sealing ring 8 made of a Glyd ring on the periphery of the valve body 1, which has a good sealing effect on the inside of the valve body 1, so that when the plunger 3 moves, the material inside the device can be extracted, and the sealing ring 8 made of a Glyd ring has a strong sealing effect, and its own friction is small, which will not affect the movement of the plunger 3, which is more practical. The extracted material will enter the valve body 1 from the feed port 19, and then be discharged from the sampling tube 2, so that the sampling valve completes the sampling. Secondly, the sealing effect of one end of the valve body 1 can be effectively improved by the packing 9, thereby increasing the working efficiency of the sampling valve, and by The packing pressure plate 10 can press the packing 9 well, making it not easy to loosen, which is more practical. When the staff has finished sampling, they can turn the hand wheel again to make the valve stem 12 drive the plunger 3 to reset. Among them, a rubber plug 5 is arranged at the other end of the plunger 3. After the plunger 3 is reset, the feed port 19 can be well sealed, so that the material inside the device is not easy to enter the valve body 1, so as to prevent the material from leaking into the valve body 1 and causing scarring inside the valve body 1, thereby avoiding affecting the next movement of the plunger 3. It is more practical. At the same time, the threaded groove 6 is used to fix the rubber plug 5, and the position of the rubber plug 5 is well limited by the limit screw 7, so that it is not easy to loosen after long-term work, thereby avoiding affecting the sealing effect at the feed port 19. It is more practical. The combination of the anti-rotation plate 13 and the sliding groove 14 can effectively prevent the valve stem 12 from rotating, thereby avoiding affecting the sealing performance of the sampling valve itself.

[0019] 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 plunger-type sampling valve, comprising a valve body (1) and a sampling tube (2), wherein one side of the valve body (1) is conductively connected to the sampling tube (2), and is characterized in that: The valve body (1) is internally slidably connected to a plunger (3), one end of the plunger (3) is fixedly connected to a connecting column (4), a rubber plug (5) is arranged on the periphery of the connecting column (4), a threaded groove (6) is arranged between the connecting column (4) and the rubber plug (5), the rubber plug (5) is internally threadedly connected to a fixing screw (7), and the other end of the fixing screw (7) is located inside the connecting column (4), a sealing ring (8) is fixedly arranged on the outer wall of the plunger (3), a packing (9) is arranged inside one end of the valve body (1), a packing pressure plate (10) is arranged at the bottom end of the packing (9), a protective sleeve (11) is fixedly connected to one end of the valve body (1), a valve stem (12) is arranged inside the protective sleeve (11), and one end of the valve stem (12) is fixedly connected to the plunger (3), an anti-rotation plate (13) is fixedly connected to the periphery of one end of the valve stem (12), and a sliding groove (14) is fixedly provided on the inner wall of the protective sleeve (11).

2. A plunger type sampling valve according to claim 1, characterized in that: The other end of the valve stem (12) is threadedly connected to a threaded sleeve (15), the threaded sleeve (15) is fixedly connected to a bearing (16) on the periphery, and the bearing (16) is fixedly connected to the inner wall of the protective sleeve (11), and one end of the threaded sleeve (15) is fixedly connected to a handwheel (17).

3. The plunger type sampling valve according to claim 1, characterized in that: The other end of the valve body (1) is fixedly connected to a flange (18) on its periphery, the other end of the valve body (1) is fixedly provided with a feed port (19), and the other end of the sampling tube (2) is provided with a sampling port (20).

4. The plunger type sampling valve according to claim 1, characterized in that: The rubber stopper (5) is threadedly connected to the connecting column (4) via a threaded groove (6); the packing pressure plate (10) and the protective sleeve (11) are fixedly connected to the valve body (1) via external screws; and the anti-rotation plate (13) is slidably connected to the protective sleeve (11) via a sliding groove (14).

5. The plunger type sampling valve according to claim 1, characterized in that: The sealing ring (8) is a Glyd ring sealing ring, and the sealing rings (8) are in a plurality of groups. The outer periphery of the valve stem (12) is fixedly provided with an external thread.

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