Needle valve body

Abstract

The utility model discloses a needle valve body and relates to the technical field of needle valve bodies, the left end of the valve body is provided with a first cavity, the right end of the valve body is provided with a water outlet channel, the rear end of the valve body is provided with a water inlet channel, a first air pipe and a second air pipe, and the front end of the valve body is provided with a second cavity. The first cavity is communicated with the water outlet channel, the first air pipe and the second air pipe, the water outlet channel is communicated with the water inlet channel and the second cavity, a valve rod is arranged in the first cavity, and a sampling assembly is arranged in the second cavity. According to the device, medium sampling can be carried out through the sampling assembly under the condition that the needle valve is not disassembled, so that the operation difficulty and cost are reduced, meanwhile, multiple sealing is carried out through overlapping of sampling openings and matching of a sealing cover and a sealing gasket and a sealing ring, the sealing performance of the valve body is ensured when sample extraction is not carried out, leakage is avoided, and the sampling efficiency is improved. The sampling process is simple and convenient, and the working efficiency is improved.

Description

Technical Field

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

[0002] A needle valve is a type of valve that allows for precise adjustment and has a wide range of applications. Instrument needle valves are an important component of instrument measurement piping systems, used to open or close pipeline passages. In its design, the valve core of a needle valve is a very sharp cone, inserted into the valve seat like a needle, hence its name. Needle valves are suitable for high-pressure environments. One end of the needle valve is the input end, and the other end is the output end. Although needle valves are widely used, the valve body itself still has some shortcomings.

[0003] Because needle valves are designed for high-pressure environments, traditional needle valves are mostly integrated units. Once assembled, they are not removed unless pipeline modifications or damage occur. However, in many cases, sampling and analysis of the medium is necessary. Due to the inconvenience of disassembling needle valves, sampling can currently only be performed in other areas of the system, which introduces more uncertainties and makes it inconvenient to extract samples from inside the valve body in practical applications. Therefore, this solution provides a needle valve body that addresses the aforementioned problems. Utility Model Content

[0004] To solve the above-mentioned technical problems, a needle valve body is provided. This technical solution addresses the issues raised in the background section. To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] A needle valve body includes a valve body with a first cavity at its left end, a water outlet channel at its right end, a water inlet channel, a first air pipe, and a second air pipe at its rear end, and a second cavity at its front end. The first cavity is connected to the water outlet channel, the first air pipe, and the second air pipe. The water outlet channel is connected to the water inlet channel and the second cavity. A valve stem is disposed inside the first cavity, and a sampling assembly is disposed inside the second cavity. The sampling assembly includes a fixed sleeve and a rotating sleeve. The fixed sleeve is fixedly installed inside the second cavity, and the rotating sleeve is rotatably installed inside the fixed sleeve. A sealing cap is threaded to the front end of the rotating sleeve, and a sealing plug is fixedly connected to the middle of the rear end of the sealing cap. The other end of the sealing plug is disposed inside the rotating sleeve.

[0006] Preferably, the outer rear end of the fixed sleeve is provided with several sets of first sampling ports, the inner rear end of the fixed sleeve is fixedly connected with several sets of limiting posts, and the outer rear end of the rotating sleeve is provided with several sets of second sampling ports and arc-shaped grooves, the second sampling ports are matched with the first sampling ports, and the arc-shaped grooves are matched with the limiting posts.

[0007] Preferably, a sealing ring is provided between the fixed sleeve and the second cavity, and a sealing gasket is provided between the sealing cover and the rotating sleeve.

[0008] Preferably, the inlet of the water inlet channel is connected to the water inlet pipe, which is fixedly installed on the right rear end of the valve body, and the outlet of the water outlet channel is connected to the water outlet pipe, which is fixedly installed on the right end of the valve body.

[0009] Preferably, the inlet of the first air pipe is connected to the first air intake pipe, the first air intake pipe is fixedly installed in the middle of the rear end of the valve body, the outlet of the second air pipe is connected to the second air intake pipe, and the second air intake pipe is fixedly installed on the left side of the rear end of the valve body.

[0010] Preferably, a piston is fixedly connected to the right end of the valve stem, the piston is slidably installed inside the first cavity, a spring is sleeved on the right end surface of the valve stem, the two ends of the spring are fixedly connected to the inner wall of the first cavity and the left end of the piston, respectively, and a valve core is fixedly installed on the right end of the piston, the right end of the valve core extends to the right side of the second cavity.

[0011] Compared with the prior art, the present invention proposes a needle valve body, which has the following beneficial effects:

[0012] 1. This utility model is equipped with a second cavity and a sampling component. When sampling is required, the needle valve is in the open state. By rotating the sealing cover, the rotating sleeve is driven, so that the second sampling port at the bottom of the rotating sleeve overlaps with the first sampling port. At this time, the sample water flows into the rotating sleeve through the two sampling ports. Then, the sealing cover is rotated again, and the rotating sleeve is subjected to the action of the limiting post, so that the sealing cover can be separated from the rotating sleeve, allowing the water sample to flow out from the rotating sleeve for collection. This device can sample the medium without disassembling the needle valve through the sampling component, thereby reducing the difficulty and cost of operation. At the same time, the overlapping of the sampling ports and the sealing cover, together with the sealing gasket and sealing ring, provide multiple seals, thereby ensuring the sealing of the valve body itself when no sample is being extracted, avoiding leakage. In addition, the sampling process is simple and convenient, improving work efficiency. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0014] Figure 2 This is a cross-sectional view of the internal structure of the valve body in this utility model;

[0015] Figure 3 This utility model Figure 2 Enlarged schematic diagram of the structure at point A in the diagram;

[0016] Figure 4This is an exploded view of the sampling component of this utility model.

[0017] The numbers on the map are:

[0018] 1. Valve body; 101. First cavity; 102. Water inlet channel; 103. Water outlet channel; 104. First air pipe; 105. Second air pipe; 106. Second cavity; 2. Water inlet pipe; 3. Water outlet pipe; 4. First air inlet pipe; 5. Second air inlet pipe; 6. Valve stem; 601. Piston; 602. Spring component; 603. Valve core; 7. Sampling assembly; 701. Fixed sleeve; 702. Rotating sleeve; 703. Sealing cover; 704. Sealing plug; 705. Sealing ring; 706. Sealing gasket; 707. First sampling port; 708. Limiting post; 709. Second sampling port; 7010. Arc groove. Detailed Implementation

[0019] The following description is intended to disclose the present invention so that those skilled in the art can implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art.

[0020] Reference Figure 1-4 As shown, a needle valve body includes a valve body 1. A first cavity 101 is formed at the left end of the valve body 1, a water outlet channel 103 is formed at the right end of the valve body 1, a water inlet channel 102, a first air pipe 104, and a second air pipe 105 are formed at the rear end of the valve body 1, and a second cavity 106 is formed at the front end of the valve body 1. The first cavity 101 is connected to the water outlet channel 103, the first air pipe 104, and the second air pipe 105. The water outlet channel 103 is connected to the water inlet channel 102 and the second cavity 106. A valve stem 6 is disposed inside the first cavity 101, and a sampling component 7 is disposed inside the second cavity 106. This device adopts an integrated design. In operation, the valve body structure allows air to be supplied through the first air inlet pipe 4, which in turn allows gas to enter the first cavity 101 via the first air pipe 104. This pushes the piston 601 to the left, causing the valve core 603 to move to the left side of the water inlet channel 102, connecting the water inlet channel 102 with the water outlet channel 103, thus opening the needle valve. When not in use, air is supplied through the second air inlet pipe 5, which in turn allows gas to enter the first cavity 101 via the second air pipe 105. This, along with the spring 602, pushes the piston 601 to the right, causing the valve core 603 to move to the right side of the second cavity 106, thus closing the needle valve.

[0021] Specifically, in this embodiment, the sampling component 7 includes a fixed sleeve 701 and a rotating sleeve 702. The fixed sleeve 701 is fixedly installed inside the second cavity 106, and the rotating sleeve 702 is rotatably installed inside the fixed sleeve 701. A sealing cover 703 is threadedly connected to the front end of the rotating sleeve 702, and a sealing plug 704 is fixedly connected to the middle of the rear end of the sealing cover 703. The other end of the sealing plug 704 is disposed inside the rotating sleeve 702.

[0022] Specifically, in this embodiment, a plurality of first sampling ports 707 are provided through the outer rear end of the fixed sleeve 701, a plurality of limiting posts 708 are fixedly connected to the inner rear end of the fixed sleeve 701, and a plurality of second sampling ports 709 and arc-shaped grooves 7010 are provided on the outer rear end of the rotating sleeve 702. The second sampling ports 709 are matched with the first sampling ports 707, and the arc-shaped grooves 7010 are matched with the limiting posts 708. When sampling is required, the needle valve is in the open state. By rotating the sealing cap 703, the rotating sleeve 702 is driven, so that the second sampling port 709 at the bottom of the rotating sleeve 702 overlaps with the first sampling port 707. At this time, the sample water flows into the rotating sleeve 702 through the two sampling ports. Then, the sealing cap 703 is rotated again. At this time, the rotating sleeve is subjected to the action of the limiting post 708, so that the sealing cap 703 can be separated from the rotating sleeve 702, so that the water sample can flow out from the rotating sleeve 702 for collection. Rotating the sealing cap 703 in the opposite direction causes the rotating sleeve 702 to rotate in the opposite direction, so that the sampling port and the sealing cap 703 can quickly seal the rotating sleeve 702.

[0023] Specifically, in this embodiment, a sealing ring 705 is provided between the fixed sleeve 701 and the second cavity 106, and a sealing gasket 706 is provided between the sealing cover 703 and the rotating sleeve 702. Multiple seals are achieved through the overlapping of the sampling ports and the cooperation of the sealing cover, sealing gasket, and sealing ring, thereby ensuring the valve body's sealing performance when no sample is being drawn, and preventing leakage.

[0024] Specifically, in this embodiment, the inlet of the water inlet channel 102 is connected to the water inlet pipe 2, which is fixedly installed on the right side of the rear end of the valve body 1. The outlet of the water outlet channel 103 is connected to the water outlet pipe 3, which is fixedly installed on the right end of the valve body 1.

[0025] Specifically, in this embodiment, the inlet of the first air pipe 104 is connected to the first air inlet pipe 4, the first air inlet pipe 4 is fixedly installed in the middle of the rear end of the valve body 1, the outlet of the second air pipe 105 is connected to the second air inlet pipe 5, and the second air inlet pipe 5 is fixedly installed on the left side of the rear end of the valve body 1.

[0026] Specifically, in this embodiment, a piston 601 is fixedly connected to the right end of the valve stem 6. The piston 601 is slidably installed inside the first cavity 101. A spring 602 is sleeved on the right end surface of the valve stem 6. The two ends of the spring 602 are fixedly connected to the inner wall of the first cavity 101 and the left end of the piston 601, respectively. A valve core 603 is fixedly installed on the right end of the piston 601. The right end of the valve core 603 extends to the right side of the second cavity 106. A sealing assembly is provided between the valve body and the valve core in this device to prevent leakage between the valve core and the valve body. The sealing assembly can adopt an existing conventional structure and has no special requirements, so it will not be described further here.

[0027] The working principle of this utility model is as follows: This device adopts an integrated valve body structure. When in use, by introducing air into the first air inlet pipe 4, the gas enters the first cavity 101 through the first air pipe 104, pushing the piston 601 to the left. The piston 601 then drives the valve core 603 to move to the left side of the water inlet channel 102, so that the water inlet channel 102 and the water outlet channel 103 are connected, thereby opening the needle valve. When not in use, by introducing air into the second air inlet pipe 5, the gas enters the first cavity 101 through the second air pipe 105, and, together with the spring 602, pushes the piston 601 to the right. The piston 601 then drives the valve core 603 to move to the right side of the second cavity 106, thereby closing the needle valve.

[0028] When sampling is required, the needle valve is in the open state. By rotating the sealing cap 703, the rotating sleeve 702 is driven, causing the second sampling port 709 at the bottom of the rotating sleeve 702 to overlap with the first sampling port 707. At this time, the sample water flows into the rotating sleeve 702 through the two sampling ports. Then, the sealing cap 703 is rotated again, and the rotating sleeve is acted upon by the limiting post 708, allowing the sealing cap 703 to detach from the rotating sleeve 702, so that the water sample can flow out of the rotating sleeve 702 for collection. Rotating the sealing cap 703 in the opposite direction causes the rotating sleeve 702 to rotate in the opposite direction, so that the sampling port and the sealing cap 703 quickly seal the rotating sleeve 702. Through the overlapping of the sampling ports and the sealing cap, the sealing gasket, and the sealing ring, multiple seals are achieved, ensuring the sealing of the valve body itself when no sample is being drawn, and preventing leakage.

[0029] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A needle valve body, characterized by, The utility model provides a valve body (1), the left end of valve body (1) is equipped with first cavity (101), the right end of valve body (1) is equipped with water outlet channel (103), the rear end of valve body (1) is equipped with water inlet channel (102), first air pipe (104) and second air pipe (105), the front end of valve body (1) is equipped with second cavity (106), first cavity (101) is linked with water outlet channel (103), first air pipe (104) and second air pipe (105) all, water outlet channel (103) is linked with water inlet channel (102) and second cavity (106) all, the inside of first cavity (101) is provided with valve rod (6), the inside of second cavity (106) is provided with sampling assembly (7), Wherein, the sampling assembly (7) includes fixed sleeve (701) and rotating sleeve (702), the fixed sleeve (701) is fixedly installed in the inside of second cavity (106), the rotating sleeve (702) is rotatably installed in the inside of fixed sleeve (701), the front end of rotating sleeve (702) is threadedly connected with sealing cover (703), the rear end middle part of sealing cover (703) is fixedly connected with sealing plug (704), the other end of sealing plug (704) is arranged in the inside of rotating sleeve (702).

2. A needle valve body according to claim 1, wherein: The rear end outside of fixed sleeve (701) is penetrated and is equipped with a plurality of first sampling ports (707), the rear end inside of fixed sleeve (701) is fixedly connected with a plurality of limiting columns (708), the rear end outside of rotating sleeve (702) is equipped with a plurality of second sampling ports (709) and arc grooves (7010), the second sampling port (709) is matched with the first sampling port (707), the arc groove (7010) is matched with the limiting column (708).

3. A needle valve body according to claim 1, wherein: The sealing ring (705) is arranged between the fixed sleeve (701) and the second cavity (106), and the sealing gasket (706) is arranged between the sealing cover (703) and the rotating sleeve (702).

4. A needle valve body according to claim 1, wherein: The inlet of water inlet channel (102) is communicated with water inlet pipe (2), the water inlet pipe (2) is fixedly installed at the rear end right side of valve body (1), the outlet of water outlet channel (103) is communicated with water outlet pipe (3), and the water outlet pipe (3) is fixedly installed at the right end of valve body (1).

5. A needle valve body according to claim 1, wherein: The inlet of first air pipe (104) is communicated with first air inlet pipe (4), the first air inlet pipe (4) is fixedly installed at the rear end middle part of valve body (1), the outlet of second air pipe (105) is communicated with second air inlet pipe (5), and the second air inlet pipe (5) is fixedly installed at the rear end left side of valve body (1).

6. A needle valve body according to claim 1, wherein: The right end of the valve stem (6) is fixedly connected with a piston (601), the piston (601) is slidingly installed in the inside of the first cavity (101), the right end surface of the valve stem (6) is sleeved with a spring piece (602), the two ends of the spring piece (602) are fixedly connected with the inner wall of the first cavity (101) and the left end of the piston (601) respectively, the right end of the piston (601) is fixedly installed with a valve core (603), the right end of the valve core (603) extends to the right side of the second cavity (106).

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