Sampling valve facilitating passage control

Abstract

The sampling valve comprises a main valve body and an auxiliary valve body which is connected with the main valve body in series, the main valve body comprises a valve body and a plug cock fixedly arranged on the valve body, a valve rod is arranged in the main valve body, and the valve rod is connected with the auxiliary valve body. The valve rod is screwed on the plug cock through external threads, one end of the valve rod is located on the outer side of the main valve body, the main valve body is provided with a liquid inlet end and a liquid outlet end, the liquid inlet end and the liquid outlet end are arranged in the same way, a through cavity is formed between the liquid inlet end and the liquid outlet end, and the main valve body is further provided with a sampling end. The sampling end is detachably connected with the pressure reducing end, the other end of the valve rod extends to the through cavity, the tail end of the valve rod is provided with a sealing conical surface structure matched with a port of the through cavity, and the sampling end arranged on the main valve body is communicated with the through cavity.

Description

Technical Field

[0001] The utility model belongs to the technical field of valves, and in particular relates to a sampling valve which is convenient for controlling a passage. Background Art

[0002] In the prior art, a sampling valve is required in fluid transportation situations. The sampling valve is generally used in combination with a pressure gauge. Specifically, on a pressure fluid transportation pipeline, it is necessary not only to monitor the fluid pressure in the pipeline, but also to sample and analyze the fluid. This requires the installation of a sampling valve on the fluid transportation pipeline. The existing sampling valve is directly connected to the pipeline without a pressure and speed control structure. Due to the presence of high-pressure fluid in the pipeline, the high-pressure fluid is easily ejected during the sampling process, affecting the sampling effect.

[0003] At the same time, the sampling valves used in the existing technology are mostly straight-through control structures. When controlling the fluid speed, the fluid flow rate and pressure are usually controlled by controlling the valve at the far end or the near end. It is impossible to overcome the pressure waves and noise caused by controlling the valve at the far end or the near end of the liquid in the pipeline during the flow state.

[0004] Based on the above factors, a sampling valve that is convenient for controlling the passage is specially provided. By setting an auxiliary valve body and a pressure reducing end, the pressure inside the pipeline is reduced during sampling to prevent sample splashing. The auxiliary valve body and the pressure reducing end are both detachably connected, which is convenient for disassembly and replacement during use, thereby extending the service life of the valve body and reducing the cost of use and maintenance. Utility Model Content

[0005] The purpose of the present utility model is to provide a sampling valve that is convenient for controlling a passage, so as to solve the problems raised in the above background technology.

[0006] The purpose of the utility model is achieved through the following technical solutions: a sampling valve that is convenient for controlling a passage, comprising a main valve body and an auxiliary valve body arranged in series with the main valve body, the main valve body comprising a valve body and a plug fixedly arranged on the valve body, a valve stem being arranged inside the main valve body, the valve stem being screwed onto the plug via an external thread and one end of the valve stem being located outside the main valve body;

[0007] The main valve body is provided with a liquid inlet end and a liquid outlet end, the liquid inlet end and the liquid outlet end are arranged identically, and a through cavity is formed between the liquid inlet end and the liquid outlet end;

[0008] The main valve body is also provided with a sampling end, and the sampling end is provided with a pressure reducing end connected in a detachable manner.

[0009] Furthermore, the other end of the valve stem extends to the through cavity, and the end of the valve stem is provided with a sealing conical surface structure, which cooperates with the through cavity port.

[0010] Furthermore, the sampling end provided on the main valve body is communicated with the through cavity;

[0011] The auxiliary valve body is detachably mounted at the liquid inlet end of the main valve body.

[0012] Furthermore, the auxiliary valve body and the liquid inlet end are detachably connected by bolts.

[0013] Furthermore, the sampling end and the pressure reducing end are detachably connected by bolts.

[0014] Furthermore, the liquid inlet end and the liquid outlet end provided in the main valve body form a step structure.

[0015] Furthermore, the pressure reducing end includes two symmetrical cones, an arcuate body is provided on a side of the cone away from the outlet hall, and a continuous gap is formed between the arcuate body and the cone.

[0016] Furthermore, the auxiliary valve body includes a control rod, a crank is provided at the front end of the control rod, the crank is connected to the piston through a connecting rod, and the crank rotates clockwise or counterclockwise;

[0017] The piston and the auxiliary valve body form a relative motion, and the piston includes a piston body and a squirrel cage frame fixedly connected to the piston body.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] The utility model realizes the pressure reduction inside the pipeline during sampling and prevents the sample from splashing by arranging the auxiliary valve body and the pressure reducing end.

[0020] In order to facilitate the purpose of reducing pressure waves and noise when the liquid in the pipeline is flowing during use, the liquid inlet end and the liquid outlet end arranged in the main valve body form a step structure to facilitate the control of the flow of the valve body passage and minimize the impact of the valve body itself on the pipeline system.

[0021] The utility model controls the auxiliary pressure and flow rate of the main passage for sampling by arranging an auxiliary valve body, and simultaneously performs secondary control on the flow rate of the sampling passage by a pressure reducing body arranged at the sampling end.

[0022] The auxiliary valve body and the pressure reducing end of the utility model are both detachably connected, which is convenient for disassembly and replacement when in use.

[0023] The utility model can realize flexible replacement and reduce the cost of use and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is an overall schematic diagram of the utility model;

[0025] Figure 2 This is a schematic diagram of the auxiliary valve body of the utility model;

[0026] Figure 3 This is an enlarged schematic diagram of the through cavity of the utility model;

[0027] Figure 4 This is a schematic diagram of the pressure reducing end of the utility model;

[0028] Figure 5 This is a schematic diagram of the utility model in which the pressure reducing end has an arc shape. DETAILED DESCRIPTION

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0030] Figure 1-5 As shown, a sampling valve for convenient passage control includes a main valve body 1 and an auxiliary valve body 2 arranged in series with the main valve body 1. The main valve body 1 includes a valve body 1-1 and a plug 1-2 fixedly arranged on the valve body 1-1. A valve stem 1-3 is arranged inside the main valve body 1. The valve stem 1-3 is screwed onto the plug 1-2 via an external thread, and one end of the valve stem 1-3 is located outside the main valve body 1.

[0031] The main valve body 1 is provided with a liquid inlet end 3 and a liquid outlet end 4, the liquid inlet end 3 and the liquid outlet end 4 are arranged identically, and a through cavity 5 is formed between the liquid inlet end 3 and the liquid outlet end 4;

[0032] The main valve body 1 is further provided with a sampling end 6 , and the sampling end 6 is provided with a pressure reducing end 7 connected in a detachable manner.

[0033] In order to facilitate the flow of liquid into the sampling end through the up and down movement of the valve stem in use, the other end of the valve stem 1-3 extends to the through cavity 5, and the end of the valve stem 1-3 is provided with a sealing conical surface structure, which cooperates with the port of the through cavity 5.

[0034] The sampling end 6 provided on the main valve body 1 is connected to the through cavity 5;

[0035] The auxiliary valve body 2 is detachably mounted at the liquid inlet end 3 of the main valve body 1 .

[0036] In order to facilitate detachable replacement during use, the auxiliary valve body 2 and the liquid inlet end 3 are detachably connected by bolts.

[0037] In order to facilitate detachable replacement during use, the sampling end 6 and the pressure reducing end 7 are detachably connected by bolts.

[0038] In order to facilitate the purpose of reducing pressure waves and noise when the liquid in the pipeline is flowing during use, the liquid inlet end 3 and the liquid outlet end 4 provided in the main valve body 1 form a step structure.

[0039] In order to reduce high-speed splashing during sampling by setting the pressure reducing end in use, the pressure reducing end 7 includes two symmetrical cones, and an arc body is provided on the side of the cone away from the outlet hall, forming a through gap between the arc body and the cone body.

[0040] In order to facilitate temporary sampling in the use state, the auxiliary valve body 2 forms a deceleration and pressure reduction effect at the liquid inlet end, and the front end of the control rod 2-1 is provided with a crank, which is connected to the piston 2-2 through a connecting rod. The crank rotates clockwise or counterclockwise;

[0041] The control rod is connected to the driving device, which is electrically driven. The crank is driven to rotate clockwise or counterclockwise by rotating the control rod. The crank is connected to the piston 2-2 through the connecting rod, driving the piston body 2-1-1 and the squirrel cage frame 2-1-2 to move. The flow rate and pressure are adjusted by the size of the gap between the squirrel cage frame 2-1-2 and the outlet position relative to the flow gap. When the auxiliary valve body adjusts the flow, the pressure flowing through the main valve body is smaller.

[0042] The piston is a hollow cylindrical structure, and the front end of the hollow cylindrical structure is arc-shaped and closed, and a flow gap is formed between the hollow cylindrical structure and the inner wall of the outer shell of the auxiliary valve body.

[0043] The piston 2-2 and the auxiliary valve body 2 form relative motion, and the piston 2-1 includes a piston body 2-1-1 and a squirrel cage frame 2-1-2 fixedly connected to the piston body.

[0044] The utility model controls the auxiliary pressure and flow rate of the main passage for sampling by arranging an auxiliary valve body, and simultaneously performs secondary control on the flow rate of the sampling passage by a pressure reducing body arranged at the sampling end.

[0045] In order to facilitate the purpose of reducing pressure waves and noise when the liquid in the pipeline is flowing during use, the liquid inlet end and the liquid outlet end arranged in the main valve body form a step structure to facilitate the control of the flow of the valve body passage and minimize the impact of the valve body itself on the pipeline system.

[0046] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0047] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A sampling valve for convenient passage control, characterized in that; The invention comprises a main valve body (1) and an auxiliary valve body (2) arranged in series with the main valve body (1); the main valve body (1) comprises a valve body (1-1) and a plug (1-2) fixedly arranged on the valve body (1-1); a valve stem (1-3) is arranged inside the main valve body (1); the valve stem (1-3) is screwed onto the plug (1-2) through an external thread, and one end of the valve stem (1-3) is located outside the main valve body (1); The main valve body (1) is provided with a liquid inlet end (3) and a liquid outlet end (4), the liquid inlet end (3) and the liquid outlet end (4) are arranged identically, and a through cavity (5) is formed between the liquid inlet end (3) and the liquid outlet end (4); The main valve body (1) is also provided with a sampling end (6), and the sampling end (6) is provided with a pressure reducing end (7) connected in a detachable manner.

2. The sampling valve for convenient passage control according to claim 1, characterized in that: The other end of the valve stem (1-3) extends to the through cavity (5), and the end of the valve stem (1-3) is provided with a sealing conical surface structure that cooperates with the port of the through cavity (5).

3. The sampling valve for convenient passage control according to claim 2, characterized in that: The sampling end (6) provided on the main valve body (1) is in communication with the through cavity (5); The auxiliary valve body (2) is detachably mounted at the liquid inlet end (3) of the main valve body (1).

4. The sampling valve for convenient passage control according to claim 3, characterized in that: The auxiliary valve body (2) and the liquid inlet end (3) are detachably connected by bolts.

5. The sampling valve for convenient passage control according to claim 4, characterized in that: The sampling end (6) and the pressure reducing end (7) are detachably connected by bolts.

6. The sampling valve for convenient passage control according to claim 5, characterized in that: The liquid inlet end (3) and the liquid outlet end (4) arranged in the main valve body (1) form a step structure.

7. The sampling valve for convenient passage control according to claim 6, characterized in that: The pressure reducing end (7) comprises two symmetrical cones, an arcuate body is arranged on a side of the cone away from the outlet hall, and a through gap is formed between the arcuate body and the cone.

8. The sampling valve for convenient passage control according to claim 7, characterized in that: The auxiliary valve body (2) includes a control rod (2-1), a crank is provided at the front end of the control rod (2-1), the crank is connected to the piston (2-2) via a connecting rod, and the crank rotates clockwise or counterclockwise; The piston (2-2) and the auxiliary valve body (2) form relative motion, and the piston (2-2) comprises a piston body (2-1-1) and a squirrel cage frame (2-1-2) fixedly connected to the piston body (2-1-1).

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