Valve with on-off state indication function

Abstract

The utility model provides a valve with an on-off state indicating function, which comprises a valve body, a valve core arranged in the valve body, a valve rod fixedly connected with the upper end of the valve core, a positioning pin convexly arranged at the top of the valve body, a lower-layer indicating plate attached to the top of the valve body, and a clearance fit formed by the valve rod penetrating out of the lower-layer indicating plate, the positioning pin penetrates out of the lower-layer indicating plate to form transition fit, the upper surface of the lower-layer indicating plate is printed with an opening character and a closing character, the portion, penetrating out of the lower-layer indicating plate, of the valve rod is sequentially and fixedly sleeved with the handle, the upper-layer indicating plate and the nut from bottom to top, the upper-layer indicating plate is provided with a window, and the window exposes the opening character or the closing character. The utility model provides the ball valve which can visually display the opening state or the closing state of the current valve, and solves the problem that the existing ball valve has no definite valve opening and closing state indication function, so that a user is easy to operate by mistake, and leakage is caused. The whole structure is simple, using is reliable, manufacturing cost is low, and the market prospect is wide.

Description

Technical Field

[0001] The utility model belongs to the technical field of valves and relates to a ball valve, in particular to a valve with a switch state indicating function. Background Art

[0002] Ball valve is a widely used valve. It is mainly used to cut off, distribute and change the flow direction of the medium in the pipeline. It can be closed tightly by rotating 90 degrees and applying a very small torque. Ball valve is most suitable for use as a switch and cut-off valve.

[0003] Since ball valves are widely used in daily life, non-professionals often come into contact with them. Currently, ball valves on the market do not have the function of indicating the valve switch status. The switch direction when the handle is turned is only printed on the handle. This makes it very inconvenient for users, especially non-professionals, to judge the current switch status of the ball valve. It is easy to open the valve by mistake when the water or gas is cut off. Once the water or gas is turned on, there will be a risk of leakage. Utility Model Content

[0004] The utility model aims to solve the above problems in the prior art and proposes a valve with a switch state indication function.

[0005] The purpose of the utility model can be achieved through the following technical solutions: a valve with a switch status indication function, comprising a valve body, a valve core is arranged in the valve body, the upper end of the valve core is fixedly connected to a valve stem, the valve stem passes through the valve body to form a rotational connection, a positioning pin is protruded from the top of the valve body, a lower indicator plate is attached to the top of the valve body, the valve stem passes through the lower indicator plate to form a clearance fit, the positioning pin passes through the lower indicator plate to form a transition fit, the upper surface of the lower indicator plate is printed with the words "open" and "close", the valve stem part passing through the lower indicator plate is fixedly sleeved with a handle, an upper indicator plate and a nut from bottom to top, the upper indicator plate is provided with a window, and the window exposes "open" or "close".

[0006] Preferably, one end of the valve body is an inlet, and the other end is an outlet, the inner walls of the inlet / the outlet are both tapped with internal threads, and the inlet / the outlet is connected to a joint through a thread.

[0007] Preferably, the valve core is a ball valve core, which has a through hole, one end of which is connected to the joint on the inlet side, and the other end of which is connected to the joint on the outlet side, and a sealing ring is tightly arranged between the ball valve core and the joint.

[0008] Preferably, a groove is provided at the upper end of the valve core, a boss is provided at the bottom end of the valve stem, and the boss is inserted into the groove to form a circumferential snap-fit ​​connection.

[0009] Preferably, an assembly hole is formed on the top surface of the valve body, and the bottom end of the positioning pin is inserted into the assembly hole to form an interference fit.

[0010] Preferably, the upper section of the valve stem is configured as a special-shaped rod, a special-shaped hole one is correspondingly opened on the handle, a special-shaped hole two is correspondingly opened on the upper indicator plate, and the special-shaped hole one / the special-shaped hole two sleeves the special-shaped rod to form a circumferential clamping and fixing; an external thread is provided on the outer circumference of the special-shaped rod, and the nut sleeves the special-shaped rod to form a threaded meshing connection.

[0011] Preferably, an arc-shaped positioning groove is recessed on the contour edge of the handle, the top end of the positioning pin is placed in the positioning groove to form a sliding connection, and the positioning pin abuts against the end of the positioning groove corresponding to the open or closed state.

[0012] Preferably, a switch rotation direction mark is printed or engraved on the handle.

[0013] Compared with the prior art, the valve with a switch state indication function has the following beneficial effects:

[0014] 1. The utility model provides a ball valve that can intuitively display the current "open" or "closed" state of the valve, solving the problem that the existing ball valve is prone to misoperation by users and causing leakage due to the lack of a clear valve switch state indication function.

[0015] 2. The utility model adopts an indication structure of upper and lower indicator plates, and through the cooperation of a static and a dynamic operation, accurate open state prompt and cut-off state prompt are realized according to positioning and limiting. The overall structure is simple, reliable in use, and low in manufacturing cost, and has a broad market prospect.

[0016] 3. The indication structure of the utility model is specifically a thin plate stacking structure, making the overall structure compact, occupying less space, and having a beautiful appearance. Brief Description of the Drawings

[0017] Figure 1 is an exploded three-dimensional view of the valve with a switch state indication function.

[0018] Figure 2 is a sectional view of the assembled structure of the valve with a switch state indication function.

[0019] Figure 3 is a three-dimensional view of the closed state of the valve with a switch state indication function.

[0020] Figure 4 is a three-dimensional view of the open state of the valve with a switch state indication function.

[0021] In the figure, 1 is the valve body; 2 is the valve core; 2a is the groove; 3 is the joint; 4 is the sealing ring; 5 is the valve stem; 5a is the boss; 5b is the special-shaped rod; 6 is the handle; 6a is the first special-shaped hole; 6b is the positioning groove; 7 is the lower indicating plate; 8 is the upper indicating plate; 8a is the second special-shaped hole; 8b is the viewing window; 9 is the positioning pin; 10 is the nut. Detailed implementation manners

[0022] The following are specific embodiments of the present invention and in combination with the attached drawings, the technical solutions of the present invention are further described, but the present invention is not limited to these embodiments.

[0023] As Figures 1 to 4 shown, the valve with the switch state indicating function includes a valve body 1. A valve core 2 is arranged inside the valve body 1. The upper end of the valve core 2 is fixedly connected to a valve stem 5. The valve stem 5 passes through the valve body 1 to form a rotational connection. Specifically, an installation hole is opened at the top of the valve body 1. The valve stem 5 passes through the valve body 1 through the installation hole and forms a free rotation through a circumferential gap. A positioning pin 9 protrudes from the top of the valve body 1. A lower indicating plate 7 is attached to the top of the valve body 1. A circular through-hole and a positioning hole are opened on the lower indicating plate 7. The valve stem 5 passes through the lower indicating plate 7 to form a clearance fit. Specifically, the valve stem 5 passes through the circular through-hole and forms a rotational connection by using the clearance. The positioning pin 9 passes through the lower indicating plate 7 to form an interference fit. The lower indicating plate 7 is positioned by passing the valve stem 5 and the positioning pin 9 through the lower indicating plate 7, realizing the accurate installation of the lower indicating plate 7 on the top surface of the valve body 1 and ensuring that the lower indicating plate 7 does not rotate relative to the valve body 1. The words "open" and "close" are printed on the upper surface of the lower indicating plate 7. The part of the valve stem 5 passing through the lower indicating plate 7 is successively sleeved with a handle 6, an upper indicating plate 8 and a nut 10 from bottom to top. A viewing window 8b is opened on the upper indicating plate 8, and the viewing window 8b exposes "open" or "close".

[0024] As Figure 2 shown, one end of the valve body 1 is the inlet, and the other end is the outlet. Internal threads are tapped on the inner walls of the inlet / outlet. The inlet / outlet is connected to the joint 3 through threads. The valve body 1 is the main housing of the ball valve. The valve body 1 and the joint 3 are locked and connected through thread fit, which is convenient for disassembly and assembly and can ensure the stability and sealing performance of the connection.

[0025] As Figures 1 to 2 shown, the valve core 2 is specifically a ball valve core 2. The ball valve core 2 has a through-hole. One port of the through-hole communicates with the joint 3 on the inlet side, and the other port of the through-hole communicates with the joint 3 on the outlet side. A sealing ring 4 is tightly arranged between the ball valve core 2 and the joint 3. When the valve core 2 rotates to the open position, the through-hole of the valve core 2 connects the two joints 3 on both sides, realizing the conducting state. When the valve core 2 rotates to the closed position, the outer wall of the valve core 2 cuts off the two joints 3 on both sides, realizing the cut-off state.

[0026] As Figures 1 to 2As shown, a groove 2a is formed at the upper end of the valve core 2, and a boss 5a is provided at the bottom end of the valve stem 5. The boss 5a is inserted into the groove 2a to form a circumferential clamping connection. Through the assembly connection between the boss 5a and the groove 2a, the valve stem 5 is fixedly connected to the valve core 2. Thus, when the valve stem 5 rotates relative to the valve body 1, it drives the valve core 2 to rotate synchronously to achieve the switching action between opening and closing.

[0027] An assembly hole is formed on the top surface of the valve body 1. The bottom end of the positioning pin 9 is inserted into the assembly hole to form an interference fit. The positioning pin 9 is firmly installed on the top of the valve body 1 through frictional pre-tightening force, and the positioning pin 9 is perpendicular to the top plane of the valve body 1.

[0028] As Figure 2 shown, the upper section of the valve stem 5 is set as a special-shaped rod 5b. A special-shaped hole one 6a is correspondingly formed on the handle 6, and a special-shaped hole two 8a is correspondingly formed on the upper indicator board 8. The special-shaped hole one 6a / the special-shaped hole two 8a is sleeved on the special-shaped rod 5b to form a circumferential clamping and fixing; an external thread is provided on the outer periphery of the special-shaped rod 5b, and a nut 10 is sleeved on the special-shaped rod 5b to form a threaded meshing connection.

[0029] The special-shaped rod 5b here has two relatively parallel planes on both sides. The special-shaped hole one 6a and the special-shaped hole two 8a are correspondingly set in the shape of flat holes. By adopting the special-shaped sleeving method, when the handle 6 rotates forward and backward, it synchronously drives the valve stem 5 and the upper indicator board 8 to rotate synchronously. Through the locking of the nut 10, the lower indicator board 7, the handle 6 and the upper indicator board 8 are tightly assembled along the axis on the valve stem 5, and it is ensured that the upper indicator board 8 can rotate synchronously with the handle 6 reliably and stably.

[0030] As Figure 2 shown, an arc-shaped positioning groove 6b is concavely provided on the contour edge of the handle 6. The top end of the positioning pin 9 is placed in the positioning groove 6b to form a sliding guide connection. The positioning pin 9 abuts against the end of the positioning groove 6b corresponding to the open or closed state. Through the limit cooperation between the positioning pin 9 and the positioning groove 6b, the rotation range of the handle 6 is determined. Through the limiting effect of the positioning groove 6b, it is ensured that the handle 6 is accurately positioned relative to the valve body 1 at the switch position.

[0031] As Figures 2 to 4 shown, a switch rotation direction mark is printed or engraved on the handle 6. The operator can also be reminded of the valve switch direction through the switch rotation direction mark.

[0032] The usage method of this valve with a switch state indication function is as follows:

[0033] As Figure 3As shown in the figure, 1. Rotate the handle 6 clockwise, causing the positioning pin 9 to slide relative to the positioning groove 6b to one end of the groove to form a stop, and simultaneously driving the valve stem 5 and the valve core 2 to rotate clockwise relative to the valve body 1 by a certain angle. At this time, the outer wall of the valve core 2 cuts off the connectors 3 on both sides, achieving the cut-off state. At the same time, the window 8b of the upper indicator board 8 just rotates to expose the word "Closed", realizing the reminder of the closed state of the valve.

[0034] As Figure 4 shown in the figure, 2. Rotate the handle 6 counterclockwise, causing the positioning pin 9 to slide relative to the positioning groove 6b to the other end of the groove to form a stop, and simultaneously driving the valve stem 5 and the valve core 2 to rotate counterclockwise relative to the valve body 1 by a certain angle. At this time, the through hole of the valve core 2 connects the connectors 3 on both sides, achieving the conducting state. At the same time, the window 8b of the upper indicator board 8 just rotates to expose the word "Open", realizing the reminder of the open state of the valve.

[0035] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Those skilled in the art to which the present invention pertains can make various modifications or supplements to the described specific embodiments or use similar methods for substitution, but will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0036] In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, the terms "installed", "connected", and "coupled" should be understood in a broad sense. For example, it 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Claims

1. A valve with a switch status indication function, comprising a valve body, a valve core is arranged in the valve body, the upper end of the valve core is fixedly connected to a valve stem, and the valve stem passes through the valve body to form a rotation connection, characterized in that: A positioning pin is protruding from the top of the valve body, a lower indicator plate is attached to the top of the valve body, the valve stem passes through the lower indicator plate to form a clearance fit, the positioning pin passes through the lower indicator plate to form a transition fit, the upper surface of the lower indicator plate is printed with the words "open" and "close", the valve stem portion passing through the lower indicator plate is fixed with a handle, an upper indicator plate and a nut in sequence from bottom to top, and a window is provided on the upper indicator plate, and the window exposes "open" or "close".

2. The valve with switch status indication function according to claim 1, characterized in that: One end of the valve body is an inlet, and the other end is an outlet. Internal threads are tapped on the inner walls of the inlet / the outlet, and the inlet / the outlet are connected to a joint through a thread.

3. The valve with switch status indication function according to claim 2, characterized in that: The valve core is specifically a ball valve core, which has a through hole. One end of the through hole is connected to the joint on the inlet side, and the other end of the through hole is connected to the joint on the outlet side. A sealing ring is tightly arranged between the ball valve core and the joint.

4. The valve with switch status indication function according to claim 1, characterized in that: A groove is formed at the upper end of the valve core, a boss is arranged at the bottom end of the valve stem, and the boss is inserted into the groove to form a circumferential clamping connection.

5. The valve with switch status indication function according to claim 1, characterized in that: An assembly hole is provided on the top surface of the valve body, and the bottom end of the positioning pin is inserted into the assembly hole to form an interference fit.

6. The valve with switch status indication function according to claim 1, characterized in that: The upper section of the valve stem is configured as a special-shaped rod, a corresponding special-shaped hole 1 is opened on the handle, and a corresponding special-shaped hole 2 is opened on the upper indicator plate. The special-shaped hole 1 / the special-shaped hole 2 are sleeved on the special-shaped rod to form a circumferential clamping fixation; an external thread is arranged on the outer periphery of the special-shaped rod, and the nut is sleeved on the special-shaped rod to form a threaded engagement connection.

7. The valve with switch status indication function according to claim 1, characterized in that: The contour edge of the handle is concavely provided with an arc-shaped positioning groove, the top end of the positioning pin is placed in the positioning groove to form a sliding connection, and the positioning pin abuts against the groove end of the positioning groove corresponding to an open or closed state.

8. The valve with switch status indication function according to claim 1, characterized in that: The handle is printed or engraved with a switch rotation direction mark.

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