Purging, sampling and discharging integrated sampling valve capable of preventing leakage and convenient to puncture
By designing all-metal sealing structure and symmetrically set sampling needle and purge needle, combined with thermocouple wire heating holes, the existing sampling valves are easily aging, ruptured and large space occupancy, and the leakage prevention, high temperature resistance and application are achieved Yu Xiao Sampling Effect.
Patent Information
- Application Number
- CN202420728985.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-10
- Publication Date
- 2025-02-25
- Estimated Expiration
- 2034-04-10
AI Technical Summary
The existing sampling valves are prone to aging and rupture, and are not resistant to high temperatures. The center of the sampling needle is set to cause the purge needle to be eccentric, which is not suitable for small sampling bottles and takes up a large space.
A leak-proof purge sampling and discharge integrated sampling valve is designed, adopting a fully metal sealed structure, the sampling needle and the purge needle are arranged symmetrically with the central axis of the flow guide seat, integrated on the flow guide seat, and installed on the sampling valve body. There are thermocouple wire heating holes.
It realizes a leak-proof and high-temperature resistant sampling process, which is suitable for small sampling bottles, reduces space occupation, and ensures the flowability of process fluid through heating holes.
Smart Images
Figure CN222529000U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of sampling valves, in particular to a purge, sampling and discharge integrated sampling valve which is leak-proof and puncture-friendly. Background Art
[0002] The sampling valve is a control device that takes process fluid from the process pipeline to the glass sampling bottle. The connection between the sampling bottle and the sampling valve relies on the sampling needle. The sampling needle pierces the stopper of the sampling bottle, and the process fluid in the process pipeline passes through the sampling valve under pressure, flows through the sampling needle, and flows into the sampling bottle. The sampling needle assembly generally consists of two needles and a guide seat. One needle guides the process fluid of the sampling valve into the sampling bottle, and the other needle uses air or nitrogen to purge the residual process fluid in the sampling valve to prevent residual process fluid from dripping when the sampling bottle is removed.
[0003] The existing sampling valves have the following defects:
[0004] The rubber structure is easy to age and crack, and is not resistant to high temperatures;
[0005] The existing sampling needle is in the center, and the purge needle is eccentric. When sampling with a small sampling bottle, it is impossible to take samples; and a larger flow guide seat is required, which occupies a large space. Therefore, it is necessary to invent a purge sampling and discharge integrated sampling valve that is leak-proof and easy to puncture to solve the above problems. Utility Model Content
[0006] The utility model aims to provide a purge sampling and discharge integrated sampling valve which is leak-proof and puncture-friendly, so as to solve the problems raised in the above-mentioned background technology.
[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:
[0008] A sampling valve with integrated purge, sampling and discharge and convenient for leakage and puncture, comprising: a sampling valve body, a sampling needle kit detachably provided at the lower end of the sampling valve body, the sampling needle kit comprising a ferrule nut, a front ferrule, a rear ferrule and a sampling needle assembly, the sampling needle assembly comprising a guide seat, a sampling needle and a purge needle are fixedly and sealedly connected at the bottom end of the guide seat, the sampling needle and the purge needle are symmetrically arranged about the central axis of the guide seat, a guide hole is provided at the center of the top end of the guide seat, a sampling inclined hole is connected to the guide hole, the sampling inclined hole is connected to the sampling needle, a purge hole is provided on the side of the guide seat, and the purge hole is connected to the purge needle, the front ferrule and the rear ferrule are both sleeved on the outside of the guide seat, the rear ferrule is located at the lower end of the front ferrule, the ferrule nut is threadedly connected to the sampling port at the lower end of the sampling valve body, and the inner bottom surface of the sampling nut is in contact with the bottom surface of the rear ferrule.
[0009] Furthermore, a first conical surface is provided at the top of the guide seat and contacts a second conical surface provided at the lower end of the sampling valve body. When the ferrule nut is tightened, the first conical surface of the guide seat and the second conical surface of the sampling valve body are in close contact to form a seal.
[0010] Furthermore, a front clamping tip is provided at the front end of the front ferrule, and when the ferrule nut is tightened, the cylindrical surface on the outer side of the guide seat fits tightly with the front clamping tip to form a seal.
[0011] Furthermore, the purge needle and the sampling needle head are pointed, and a hole is opened on the upper side of the tip.
[0012] Furthermore, the distance A between the sampling needle and the purge needle is 7 mm to 50 mm, the diameter D2 of the purge needle is 1.5 to 6 mm, the diameter D1 of the sampling needle is 1.5 to 8 mm, and the height H is 0 to 50 mm.
[0013] Furthermore, a thermocouple wire heating hole is provided on the sampling valve body.
[0014] Furthermore, the bottom end of the guide seat is welded to the sampling needle and the purge needle.
[0015] Compared with the prior art, the beneficial effects of the utility model are:
[0016] 1. Since the sampled process fluid is toxic or highly corrosive, the sampling needle of the utility model adopts a full metal seal without a rubber structure seal, which avoids leakage due to aging or rupture of the rubber, thereby threatening the life safety of the operator and polluting the environment.
[0017] Second, the purge needle and sampling needle of the utility model have a pointed tip, and a hole is opened on the upper side of the tip, so that the sampling needle can more easily pierce the rubber bottle stopper or PTFE diaphragm during sampling and is not easy to be blocked by the purge needle and the sampling needle.
[0018] 3. The existing sampling needle is set at the center of the guide seat, and the purge needle is set eccentrically, so it is impossible to use a small sampling bottle for sampling, and a larger guide seat is required, which takes up a lot of space. The sampling needle and the purge needle of the utility model are integrated on the guide seat, and the sampling needle and the purge needle are symmetrical about the central axis of the sampling bottle, so a sampling bottle with a relatively small bottle mouth can be selected for sampling.
[0019] 4. The sampling valve body of the utility model is provided with a thermocouple wire heating hole. When the temperature of the fluid is low, the viscosity is high, and the process fluid is heated by the thermocouple wire in the thermocouple wire heating hole, thereby ensuring its fluidity. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:
[0021] Figure 1 This is a schematic diagram of the connection between the sampling bottle and the sampling valve body (open state) with the sampling needle kit installed;
[0022] Figure 2 for Figure 1 Middle AA section view;
[0023] Figure 3 for Figure 1 Schematic diagram of the valve stem flow path of the middle sampling valve body;
[0024] Figure 4 is a schematic diagram of the structure of the sampling needle assembly;
[0025] Figure 5 This is a schematic diagram of the flow path of the sampling valve body in the sampling state;
[0026] Figure 6 This is a schematic diagram of the flow path of the sampling valve body in the purge state;
[0027] Figure 7 for Figure 1 Schematic diagram of the structure of the middle ferrule end;
[0028] Figure 8 for Figure 1 Schematic diagram of the local structure at the middle discharge port;
[0029] Fig. 9 This is a schematic diagram of the optional connection port structure sealed with PTFE gasket;
[0030] Fig.10 To cooperate Fig. 9 A schematic diagram of the connection connector structure of the optional connection port;
[0031] Fig.11 It is a schematic diagram of the structure of an optional connection port sealed with a metal gasket;
[0032] Fig.12 To cooperate Fig.11 A schematic diagram of the connection connector structure of the optional connection port;
[0033] Fig.13 This is a schematic diagram of the sampling valve body (closed state) with the sampling needle kit installed;
[0034] Fig.14 for Fig.13 Schematic diagram of the valve stem flow path of the sampling valve body.
[0035] In the figure: 1. Sampling bottle; 2. Bottle cap; 3. Bottle stopper; 4. Ferrule nut; 5. Flow guide seat; 5a. Flow guide hole; 5b. Sampling inclined hole; 5c. Purge hole; 5e. First cone surface; 5f. Cylindrical surface; 6. Valve body; 6a. Discharge inclined hole; 6b. Discharge port; 6c. Thermocouple wire heating hole; 6d. Purge port; 6e. Second cone surface; 7. Valve stem; 8. Front ferrule; 8a. Front ferrule tip; 9. Rear ferrule; 10. Purge needle; 11. Sampling needle; 12. Handle; 13. Optional connection port. DETAILED DESCRIPTION
[0036] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model; it is obvious that the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the utility model without making creative work are within the scope of protection of the utility model.
[0037] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.
[0038] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "set / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. Example
[0039] like Figure 1-14As shown, a leak-proof and puncture-friendly purge sampling and discharge integrated sampling valve comprises: a sampling valve body 6, a sampling needle kit is detachably provided at the lower end of the sampling valve body 6, the sampling needle kit comprises a ferrule nut 4, a front ferrule 8, a rear ferrule 9 and a sampling needle assembly, the sampling needle assembly comprises a guide seat 5, a sampling needle 11 and a purge needle 10 are fixedly and sealedly connected at the bottom end of the guide seat 5, the sampling needle 11 and the purge needle 10 are symmetrically arranged about the central axis of the guide seat 5, and the top of the guide seat 5 A flow guide hole 5a is provided at the center of the end, and a sampling oblique hole 5b is connected to the flow guide hole 5a, and the sampling oblique hole 5b is connected to the sampling needle 11. A purge hole 5c is provided on the side of the flow guide seat 5, and the purge hole 5c is connected to the purge needle 10. The front ferrule 8 and the rear ferrule 9 are both sleeved on the outside of the flow guide seat 5, and the rear ferrule 9 is located at the lower end of the front ferrule 8. The ferrule nut 4 is threadedly connected to the sampling port at the lower end of the sampling valve body 6, and the inner bottom surface of the sampling nut is in contact with the bottom surface of the rear ferrule 9. In this embodiment, the bottom end of the flow guide seat 5 is fixed to the sampling needle 11 and the purge needle 10 by welding.
[0040] Furthermore, a first conical surface 5e is provided at the top of the flow guide seat 5 to contact a second conical surface 6e provided at the lower end of the sampling valve body 6. When the ferrule nut 4 is tightened, the first conical surface 5e of the flow guide seat 5 and the second conical surface 6e of the sampling valve body 6 are in close contact to form a seal.
[0041] Furthermore, a front clamping tip 8a is provided at the front end of the front ferrule 8. When the ferrule nut 4 is tightened, the cylindrical surface 5f on the outer side of the guide seat 5 fits tightly with the front clamping tip 8a to form a seal.
[0042] Furthermore, the heads of the purging needle 10 and the sampling needle 11 are pointed, and holes are opened on the upper side of the pointed ends, so that the sampling needle 11 can more easily pierce the bottle stopper 3 during sampling and is not easy to clog the purging needle 10 and the sampling needle 11. In this embodiment, the bottle stopper 3 is lined with PTFE or a rubber pad.
[0043] Furthermore, the distance A between the sampling needle 11 and the purge needle 10 is 7 mm to 50 mm, the diameter D2 of the purge needle 10 is 1.5 to 6 mm, the diameter D1 of the sampling needle 11 is 1.5 to 8 mm, and the height H is 0 to 50 mm.
[0044] Furthermore, a thermocouple wire heating hole 6c is provided on the sampling valve body 6. When the fluid temperature is low and the viscosity is high, the process fluid is heated by the thermocouple wire in the thermocouple wire heating hole 6c, thereby ensuring its fluidity.
[0045] Further, Figure 1 The sampling valve body 6 injection port shown in the figure is a ferrule end, which can be changed to the attached Fig. 9 Or the optional connection port 13 in 11; the purge connection port 6d is a sleeve, connected as Figure 5Check valve, ball valve and filter regulator shown. Figure 1 The exhaust port 6b is shown as being internally NPT threaded.
[0046] The working principle of the utility model is as follows:
[0047] When replacing the sampling needle kit, Fig.13 As shown, at this time, the valve stem 7 of the sampling valve body 6 is in a closed state. The sampling needle kit to be replaced, including the ferrule nut 4, the front ferrule 8, the rear ferrule 9 and the sampling needle assembly, is aligned with the center of the sampling port of the sampling valve body 6. The first conical surface 5e of the flow guide seat 5 of the sampling needle assembly is pressed against the second conical surface 6e of the sampling valve, and the ferrule nut 4 is tightened. At this time, the first conical surface 5e of the flow guide seat 5 of the sampling needle assembly fits with the second conical surface of the sampling valve to form a seal; the front ferrule 8 is deformed under the action of the ferrule nut 4, deforms inward, and clamps the cylindrical surface 5f of the flow guide seat 5 to form a seal.
[0048] When performing sampling operations, such as Figure 1 As shown, the sampling bottle 1 is pushed upward from the bottom of the sampling valve body 6 which has been equipped with the sampling needle assembly, the sampling needle 11 and the purge needle 10 pierce the bottle stopper 3 at the center of the bottle cap 2, and the handle 12 is rotated counterclockwise to open the sampling valve body 6. Figure 1 As shown, the process fluid in the process pipeline is reduced in pressure to a suitable pressure through the pressure reducing valve, flows through the sampling valve, and flows into the sampling bottle 1. After the sampling of the sampling bottle 1 is completed, the handle 12 is rotated clockwise to close the sampling valve body 6. Figure 3 As shown, open the ball valve, air or nitrogen opens the one-way valve, flows through the purge port 6d, from the valve stem 7, the center hole of the flow guide seat 5, the sampling inclined hole 5b, the inner hole of the sampling needle 11, the sampling bottle 1, the purge needle 10, the purge hole 5c, the discharge inclined hole 6a, and finally to the discharge port 6b, purge the residual process fluid in the flow channel space between the valve stem 7 and the flow guide seat 5 into the sampling bottle 1, and discharge the remaining volatile gas into the discharge pipeline through the discharge port 6b. After the purge is completed, close the gas source ball valve and remove the sampling bottle 1.
[0049] Compared with the prior art, the utility model has the following beneficial effects:
[0050] First, since the sampled process fluid is toxic or highly corrosive, the sampling needle 11 of the utility model adopts a full metal seal without a rubber structure seal, thereby avoiding leakage due to aging or rupture of the rubber, thereby threatening the life safety of the operator and polluting the environment.
[0051] Second, the heads of the purge needle 10 and the sampling needle 11 of the utility model are pointed, and the upper side of the tip is opened, so that the sampling needle 11 can more easily pierce the rubber bottle stopper 3 or the PTFE diaphragm during sampling and is not easy to be blocked by the purge needle 10 and the sampling needle 11.
[0052] 3. The existing sampling needle 11 is set at the center of the guide seat 5, and the purge needle 10 is set eccentrically, so it is impossible to use a small sampling bottle 1 for sampling, and a larger volume of the guide seat 5 is required, which occupies a large space. The sampling needle 11 and the purge needle 10 of the utility model are integrated on the guide seat 5. The sampling needle 11 and the purge needle 10 are symmetrical about the central axis of the sampling bottle 1, and a sampling bottle 1 with a relatively small bottle mouth can be selected for sampling.
[0053] 4. The sampling valve body 6 of the utility model is provided with a thermocouple wire heating hole 6c. When the fluid temperature is low, the viscosity is high, and the process fluid is heated by the thermocouple wire in the thermocouple wire heating hole 6c, thereby ensuring its fluidity.
[0054] The above are only preferred specific implementations of the utility model; however, the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solution and improved ideas of the utility model within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model.
Claims
1. A leak-proof, puncture-friendly, purge-sampling-discharge integrated sampling valve, characterized in that: include: A sampling valve body (6), the lower end of the sampling valve body (6) is detachably provided with a sampling needle kit, the sampling needle kit comprising a ferrule nut (4), a front ferrule (8), a rear ferrule (9) and a sampling needle assembly, the sampling needle assembly comprising a flow guide seat (5), the bottom end of the flow guide seat (5) is fixedly sealed and connected with a sampling needle (11) and a purge needle (10), the sampling needle (11) and the purge needle (10) are symmetrically arranged about the central axis of the flow guide seat (5), the top center of the flow guide seat (5) is provided with a flow guide hole (5a), the flow guide hole ( A sampling inclined hole (5b) is connected to the flow guide seat (5a), the sampling inclined hole (5b) is connected to the sampling needle (11), a purge hole (5c) is arranged on the side of the flow guide seat (5), the purge hole (5c) is connected to the purge needle (10), the front ferrule (8) and the rear ferrule (9) are both sleeved on the outside of the flow guide seat (5), the rear ferrule (9) is located at the lower end of the front ferrule (8), the ferrule nut (4) is threadedly connected to the sampling port at the lower end of the sampling valve body (6), and the inner bottom surface of the sampling nut is in contact with the bottom surface of the rear ferrule (9).
2. According to claim 1, a leak-proof, puncture-friendly, purge-sampling-discharging integrated sampling valve is characterized by: The top end of the flow guide seat (5) is provided with a first conical surface (5e) which contacts with a second conical surface (6e) provided at the bottom end of the sampling valve body (6); when the ferrule nut (4) is tightened, the first conical surface (5e) of the flow guide seat (5) and the second conical surface (6e) of the sampling valve body (6) are in close contact with each other to form a seal.
3. The leak-proof, puncture-friendly, purge-sampling-discharging integrated sampling valve according to claim 1 is characterized by: The front end of the front ferrule (8) is provided with a front clamping tip (8a), and when the ferrule nut (4) is tightened, the cylindrical surface (5f) on the outside of the guide seat (5) fits tightly with the front clamping tip (8a) to form a seal.
4. The leak-proof, puncture-friendly, purge-sampling-discharging integrated sampling valve according to claim 1 is characterized by: The heads of the purge needle (10) and the sampling needle (11) are pointed, and holes are opened on the upper sides of the pointed ends.
5. The leak-proof, puncture-friendly, purge-sampling-discharging integrated sampling valve according to claim 1 is characterized by: The distance A between the sampling needle (11) and the purging needle (10) is 7 mm to 50 mm, the diameter D2 of the purging needle (10) is 1.5 to 6 mm, the diameter D1 of the sampling needle (11) is 1.5 to 8 mm, and the height H is 0 to 50 mm.
6. The leak-proof, puncture-friendly, purge-sampling-discharging integrated sampling valve according to claim 1, characterized in that: The sampling valve body (6) is provided with a thermocouple wire heating hole (6c).
7. The leak-proof, puncture-friendly, purge-sampling-discharging integrated sampling valve according to claim 1, characterized in that: The bottom end of the flow guide seat (5) is welded to the sampling needle (11) and the purge needle (10).