Sampling valve capable of preventing mistaken opening

Abstract

The utility model discloses a mistaken opening prevention sampling valve which comprises a valve seat, a sleeve is arranged on the valve seat, the sleeve is provided with a valve rod and a driving assembly used for driving the valve rod to ascend and descend, the driving assembly comprises a hand wheel and a valve rod nut, the hand wheel is rotatably connected with the sleeve, the valve rod nut is arranged on the hand wheel and connected with the valve rod, and the valve rod is in threaded connection with the valve rod nut. A locking structure is arranged between the sleeve and the hand wheel and comprises a lock hole formed in one side of the hand wheel, a lock rod movably arranged on one side of the sleeve and capable of being matched with the lock hole in an inserted mode when the sampling valve is in a closed state, and a driving piece arranged on the lock rod and used for driving the lock rod to move. According to the sampling valve, the locking structure is arranged between the hand wheel and the sleeve, so that liquid or gas leakage caused by mistaken opening or inaccurate closing of the hand wheel is effectively avoided, and the use safety of the sampling valve is improved; the state of the sampling valve can be visually displayed through the upper connecting piece and the lower connecting piece which are arranged in a protruding mode, the structure is simple, novel and reasonable, and operation is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid sampling, in particular to a sampling valve that prevents accidental opening. Background Art

[0002] A sampling valve is a valve used to obtain medium samples in pipelines or equipment. It is sealed by the cone at the bottom of the valve stem and the tapered hole of the valve seat. When sampling, the handwheel is used to lift the position of the valve stem to separate the cone from the tapered hole, so that the medium in the tapered hole can flow into the external sampling vessel.

[0003] Existing sampling valves mark the words "open" and "close" on the handwheel to prompt the user to turn the handwheel in the direction of sampling or closing the valve. However, since the operation range between fully closed and fully open is only 90° (1 / 4 turn), it is very easy to cause liquid or gas leakage due to accidental opening or inaccurate closing, thus causing safety accidents. Summary of the Invention

[0004] In order to overcome the above defects, the utility model provides an anti-misopening sampling valve, which has a simple structure, is easy to operate, can accurately close the valve, reduce the leakage of liquid or gas caused by misopening or inaccurate closure, and reduce safety hazards.

[0005] The utility model adopts a technical solution to solve the technical problem as follows: providing an anti-misoperational sampling valve, comprising a valve seat, a sleeve provided on the valve seat, a valve stem provided on the sleeve, and a drive assembly for driving the valve stem to rise and fall, the drive assembly comprising a hand wheel rotatably connected to the sleeve, and a valve stem nut provided on the hand wheel and connected to the valve stem, the valve stem being threadedly connected to the valve stem nut;

[0006] A locking structure is provided between the sleeve and the hand wheel, and the locking structure comprises:

[0007] A lock hole is provided on one side of the hand wheel;

[0008] A locking rod is movably arranged on one side of the sleeve and can be plugged into and matched with the locking hole when the sampling valve is in a closed state;

[0009] And, a driving member is provided on the locking rod and is used to drive the locking rod to move.

[0010] As a further improvement of the present invention, the locking structure further comprises an upper connecting member and a lower connecting member, which are arranged along the axis of the locking rod and are respectively protruded on the outer peripheral wall of the hand wheel and the sleeve on the corresponding side;

[0011] The upper connecting member is provided with the locking hole, the lower connecting member is provided with a through hole in a vertical direction, and the locking rod is movably provided in the through hole.

[0012] As a further improvement of the present invention, the locking rod is a cylindrical structure, one end of the driving member is connected to the outer wall of one end of the locking rod away from the lock hole, and the other end extends horizontally to the outside of the lower connecting member.

[0013] As a further improvement of the present invention, a stop portion is provided at the bottom of the lower connecting member surrounding the through hole, and a locking portion adapted to the lock hole is provided at the upper end of the locking rod, and a linkage portion integrally connected to the lower end of the locking portion and passing through the stop portion;

[0014] A return spring is sleeved on the linkage portion, and two ends of the return spring elastically abut against the locking portion and the stop portion respectively;

[0015] The driving member is connected to the outer wall of the lower end of the linkage portion extending outside the stop portion, and can drive the locking rod to move back and forth along its own axial direction.

[0016] As a further improvement of the present invention, the driving member is detachably connected to the locking rod, and the driving member has a plug-in portion and a toggle portion integrally connected to the plug-in portion. The plug-in portion is a quadrangular prism structure, and the locking rod is provided with a plug-in hole that is compatible with the plug-in portion.

[0017] As a further improvement of the present invention, the lower connecting member is provided with a U-shaped groove at one end away from the upper connecting member, and a limiting boss is provided in the U-shaped groove, and the limiting boss divides the U-shaped groove into two limiting grooves arranged vertically along the axis direction of the locking rod;

[0018] A notch is provided on a side of the limiting boss away from the bottom of the U-shaped groove, the notch being connected to the through hole and being used to avoid the driving member;

[0019] The driving member is connected to the locking rod and can drive the locking rod to rotate around its own axis and move along its own axis.

[0020] As a further improvement of the present invention, the driving member is a cylindrical handle structure, and the radial dimension of the driving member is adapted to the groove width of the limiting groove and the width of the notch.

[0021] The beneficial effects of the present invention are as follows: by providing a locking structure between the hand wheel and the sleeve, leakage of liquid or gas caused by the hand wheel being opened by mistake or not closed accurately is effectively avoided, thereby greatly improving the safety of the sampling valve; in addition, the state of the sampling valve can be visually displayed by the protruding upper and lower connecting pieces; the present invention has a simple, novel, reasonable structure and is easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic structural diagram of the first embodiment of the present invention;

[0023] Figure 2 A schematic diagram showing the internal structure of the first embodiment of the present invention is shown by cutting away a portion of the existing view;

[0024] Figure 3 This is a schematic diagram of the exploded structure of the first embodiment of the present utility model;

[0025] Figure 4 This is a structural diagram of the second embodiment of the present utility model.

[0026] The following description is made with reference to the accompanying drawings:

[0027] 1. Valve seat; 11. Sleeve; 12. Valve stem; 3. Drive assembly; 31. Handwheel;

[0028] 32. Valve stem nut; 40. Locking hole; 41. Locking rod; 411. Locking part; 412. Linkage part; 413. Connecting hole; 42. Driving member; 421. Connecting part; 422. Toggle part; 43. Upper connecting member; 44. Lower connecting member; 441. Stop part; 442. U-shaped groove; 443. Limiting boss; 444. Limiting groove; 445. Notch; 45. Through hole; 46. Return spring. DETAILED DESCRIPTION

[0029] A preferred embodiment of the present invention is described in detail below with reference to the accompanying drawings.

[0030] See Figures 1 to 4 The utility model provides a sampling valve that prevents accidental opening, including a valve seat 1, a sleeve 11 is provided on the valve seat 1, the sleeve 11 is provided with a valve stem 12, and a driving assembly 3 for driving the valve stem 12 to rise and fall, the driving assembly 3 includes a handwheel 31 rotatably connected to the sleeve 11, and a valve stem nut 32 provided on the handwheel 31 and connected to the valve stem 12, and the valve stem 12 is threadedly connected to the valve stem nut 32. Among them, the handwheel 31 is sealed with the sleeve 11 and can rotate around the center axis of the sleeve 11 to drive the valve stem nut 32 to rotate, thereby driving the valve stem 12 to move up and down to achieve the closing or opening of the valve port of the sampling valve. It should be noted that a sampling port is provided in the valve seat 1, and a plug capable of closing the sampling port is provided at the bottom of the valve stem 12. This structure belongs to the conventional setting in this field and will not be described in detail in this application.

[0031] See Figures 1 to 3The present application provides a locking structure between the sleeve 11 and the handwheel 31 to prevent the handwheel 31 from being misoperated or not closed properly. The locking structure can be understood to enable the handwheel 31 to have a locked state and an unlocked state. In the locked state, the handwheel 31 cannot be rotated, which means the sampling port is in a closed state. In the unlocked state, the handwheel 31 can be rotated to open the sampling port.

[0032] Continue reading Figures 1 to 3 , the utility model provides embodiment 1.

[0033] The locking structure includes:

[0034] A lock hole 40 is provided on one side of the hand wheel 31;

[0035] The locking rod 41 is movably provided on one side of the sleeve 11 and can be plugged into and matched with the locking hole 40 when the sampling valve is in a closed state;

[0036] And, a driving member 42 is provided on the locking rod 41 for driving the locking rod 41 to move.

[0037] Specifically, the locking structure also includes an upper connecting member 43 and a lower connecting member 44. The upper connecting member 43 and the lower connecting member 44 are arranged along the axial direction of the locking rod 41 and are respectively protruded on the outer peripheral wall of the corresponding side of the handwheel 31 and the sleeve 11; the upper connecting member 43 is provided with a locking hole 40, and the lower connecting member 44 is provided with a through hole 45 in the vertical direction, and the locking rod 41 is movably provided in the through hole 45.

[0038] The locking rod 41 is a cylindrical structure. One end of the driving member 42 is connected to the outer wall of the locking rod 41 away from the locking hole 40, and the other end extends horizontally to the outside of the lower connecting member 44, and can drive the locking rod 41 to move and insert or disengage from the locking hole 40.

[0039] Furthermore, a stop portion 441 is provided at the bottom of the lower connecting member 44 around the through hole 45, and a locking portion 411 adapted to the locking hole 40 is provided at the upper end of the locking rod 41, and a linkage portion 412 integrally connected to the lower end of the locking portion 411 and passing through the stop portion 441; a return spring 46 is sleeved on the linkage portion 412, and both ends of the return spring 46 are elastically abutted against the locking portion 411 and the stop portion 441 respectively, that is, the return spring 46 is sleeved on the locking rod 41 and accommodated in the cavity formed by the through hole 45 of the lower connecting member 44 and the stop portion 441; the driving member 42 is connected to the outer wall of the lower end of the linkage portion 412 extending outside the stop portion 441, and can drive the locking rod 41 to reciprocate along its own axial direction.

[0040] Among them, the locking rod 41 is elastically set on the lower connecting member 44 by the return spring 46, and under the action of the return spring 46, it can move along its own axis when the locking hole 40 and the through hole 45 are relative to each other, so that the upper end locking part 411 is automatically inserted into the locking hole 40, so as to achieve the locking of the handwheel 31 and confirm that the sampling port is in a fully closed state; in addition, visually, when the upper connecting member 43 and the lower connecting member 44 are aligned, it can also indicate that the sampling port is in a fully closed state.

[0041] Furthermore, the driving member 42 is detachably connected to the locking rod 41. The driving member 42 includes a plug-in portion 421 and a toggle portion 422 integrally connected to the plug-in portion 421. The plug-in portion 421 is a quadrangular prism structure, and the toggle portion 422 is a sheet-like member. The locking rod 41 is provided with a plug-in hole 413 that is compatible with the plug-in portion 421. It is understood that when the return spring 46 is in a free state, the plug-in hole 413 is located outside the lower end surface of the lower connecting member 44.

[0042] When in use, insert the plug-in part 421 of the driving member 42 into the plug-in hole 413 of the locking rod 41, and manually press the toggle part 422 downward. Under the action of the spring force of the reset spring 46, the locking rod moves downward along its own axis, so that the locking part 411 at its upper end disengages from the locking hole 40, thereby unlocking the handwheel 31, and synchronously rotating the handwheel 31 to open the sampling port.

[0043] See Figure 4 , the utility model provides the second embodiment. Figure 4 The state of is used as a reference, and the handwheel is defined as up and the valve seat as down.

[0044] The difference from Example 1 is that: the lower connecting member 44 is provided with a U-shaped groove 442 at the end away from the upper connecting member 43, and a limiting boss 443 is provided in the U-shaped groove 442, which divides the U-shaped groove 442 into two limiting grooves 444 arranged vertically along the axial direction of the locking rod 41; the limiting boss 443 is provided with a notch 445 on the side away from the bottom of the U-shaped groove 442, which is connected to the through hole 45 and is used to avoid the driving member 42; the driving member 42 is a cylindrical handle structure, and the radial dimension of the driving member 42 is adapted to the groove width of the limiting groove 444 and the width of the notch 445.

[0045] One end of the driving member 42 is fixedly connected to the locking rod 41 , and can drive the locking rod 41 to rotate around its own axis and move along its own axis.

[0046] For details, see Figure 4The handwheel is in the unlocked state. At this time, the driving member 42 is located in the limiting groove 444 at the lower end. When locking is required, the driving member 42 is rotated to drive the locking rod 41 to rotate around its own axis until the driving member 42 is placed directly below the notch 445. Then the driving member 42 is pushed upward to drive the locking rod 41 to move upward along its own axis so that the upper end of the locking rod 41 is inserted into the locking hole 40 of the handwheel 31. At this time, the driving member 42 is placed in the upper limiting groove 444. Then the driving member 42 is rotated to drive the locking rod 41 to rotate around its own axis to the limiting groove 444 positioned at the upper end to achieve locking of the handwheel 31.

[0047] In summary, the anti-misopening sampling valve provided by the utility model effectively avoids the leakage of liquid or gas caused by the hand wheel being accidentally opened or not closed accurately by arranging a locking structure between the hand wheel and the sleeve, thereby greatly improving the safety of the use of the sampling valve; in addition, the state of the sampling valve can also be visually displayed through the protruding upper and lower connecting parts; the utility model has a simple, novel, reasonable structure and is easy to operate.

[0048] In the above description, many specific details are set forth in order to fully understand the present invention. However, the above description is only a preferred embodiment of the present invention. The present invention can be implemented in many other ways different from those described herein, so the present invention is not limited by the specific implementation disclosed above. At the same time, any person skilled in the art can use the above-disclosed methods and technical contents to make many possible changes and modifications to the technical solution of the present invention without departing from the scope of the technical solution of the present invention, or modify it into an equivalent embodiment of equivalent changes. Any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the scope of protection of the technical solution of the present invention.

Claims

1. A sampling valve for preventing accidental opening, comprising a valve seat (1), characterized in that: The valve seat (1) is provided with a sleeve (11), the sleeve (11) is provided with a valve stem (12), and a driving assembly (3) for driving the valve stem (12) to rise and fall, the driving assembly (3) comprising a hand wheel (31) rotatably connected to the sleeve (11), and a valve stem nut (32) provided on the hand wheel (31) and connected to the valve stem (12), the valve stem (12) being threadedly connected to the valve stem nut (32); A locking structure is provided between the sleeve (11) and the hand wheel (31), and the locking structure comprises: A lock hole (40) is provided on one side of the hand wheel (31); A locking rod (41) is movably arranged on one side of the sleeve (11) and can be plugged into and matched with the locking hole (40) when the sampling valve is in a closed state; And, a driving member (42) is provided on the locking rod (41) and is used to drive the locking rod (41) to move.

2. The sampling valve for preventing accidental opening according to claim 1, characterized in that: The locking structure further comprises an upper connecting member (43) and a lower connecting member (44), wherein the upper connecting member (43) and the lower connecting member (44) are arranged along the axial direction of the locking rod (41) and are respectively protruded on the outer peripheral wall of the hand wheel (31) and the sleeve (11) on one side thereof; The upper connecting member (43) is provided with the locking hole (40), the lower connecting member (44) is provided with a through hole (45) in a vertical direction, and the locking rod (41) is movably provided in the through hole (45).

3. The sampling valve for preventing accidental opening according to claim 2, characterized in that: The locking rod (41) is a cylindrical structure, one end of the driving member (42) is connected to the outer wall of one end of the locking rod (41) away from the locking hole (40), and the other end extends horizontally to the outside of the lower connecting member (44).

4. The sampling valve for preventing accidental opening according to claim 3, characterized in that: The bottom of the lower connecting member (44) is provided with a stopper (441) surrounding the through hole (45); the upper end of the locking rod (41) is provided with a locking portion (411) adapted to the locking hole (40), and a linkage portion (412) integrally connected to the lower end of the locking portion (411) and passing through the stopper (441); A return spring (46) is sleeved on the linkage portion (412), and two ends of the return spring (46) elastically abut against the locking portion (411) and the stop portion (441) respectively. The driving member (42) is connected to the outer wall of the lower end of the linkage portion (412) extending outside the stop portion (441), and is capable of driving the locking rod (41) to move back and forth along its own axial direction.

5. The sampling valve for preventing accidental opening according to claim 4, characterized in that: The driving member (42) is detachably connected to the locking rod (41), and the driving member (42) comprises a plug-in portion (421) and a toggle portion (422) integrally connected to the plug-in portion (421). The plug-in portion (421) is a quadrangular prism structure, and the locking rod (41) is provided with a plug-in hole (413) adapted to the plug-in portion (421).

6. The sampling valve for preventing accidental opening according to claim 3, characterized in that: The lower connecting member (44) is provided with a U-shaped groove (442) at one end away from the upper connecting member (43), and a limiting boss (443) is provided in the U-shaped groove (442). The limiting boss (443) divides the U-shaped groove (442) into two limiting grooves (444) arranged vertically along the axis of the locking rod (41); A notch (445) communicating with the through hole (45) and used to avoid the driving member (42) is provided on a side of the limiting boss (443) away from the bottom of the U-shaped groove (442); The driving member (42) is connected to the locking rod (41) and can drive the locking rod (41) to rotate around its own axis and move along its own axis.

7. The sampling valve for preventing accidental opening according to claim 6, characterized in that: The driving member (42) is a cylindrical handle structure, and the radial dimension of the driving member (42) is adapted to the slot width of the limiting slot (444) and the width of the notch (445).

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