Gate valve capable of displaying opening state of valve plate in real time

Abstract

The utility model provides a gate valve capable of displaying the opening degree state of a valve plate in real time, which comprises a driving valve rod capable of synchronously rotating with a valve handle and a valve plate valve rod in transmission connection with the driving valve rod and capable of driving the valve plate to be opened and closed. The transmission valve rod is in transmission connection with the driving valve rod, the pointer is arranged on the transmission valve rod and synchronously rotates with the transmission valve rod, and the dial plate assembly covers the pointer. By the adoption of the structure, internal driving of the valve plate is achieved by rotating the valve handle, and the ascending or descending state of the valve plate can be clearly known through the pointer and a dial plate; and unnecessary loss caused by misoperation is avoided.

Description

Technical Field

[0001] This utility model relates to the field of gate valve technology, specifically a gate valve that can display the valve plate opening status in real time. Background Technology

[0002] A non-rising stem gate valve is also called a rotary stem gate valve. The valve stem nut is located on the gate plate. Rotating the handwheel drives the valve stem to rotate, thereby raising the gate plate.

[0003] Because the stem of a non-sucking gate valve is not exposed outside the valve body, operators can only rely on experience or the locked state of the valve handle to confirm whether the valve is open or closed. For example, a non-sucking gate valve with publication number CN104747745A uses a positioning ring to alleviate the problem of excessive torque when turning the valve stem during the opening and closing of the gate valve. However, it is not easy to observe the opening and closing status of the gate valve, which can easily lead to operator errors, such as excessive turning of the valve handle causing deformation of the rubber gasket at the bottom of the valve and failure to spring back, or loosening of the valve screws. Utility Model Content

[0004] To overcome the existing technical problems, this utility model provides a gate valve that can display the valve plate opening status in real time.

[0005] The present invention adopts the following technical solution.

[0006] A gate valve capable of displaying the opening status of a valve plate in real time includes a drive valve stem that can rotate synchronously with the valve handle, a valve plate stem that is pulsatorically connected to the drive valve stem and can drive the valve plate to open and close, a transmission valve stem that is pulsatorically connected to the drive valve stem, a pointer disposed on the transmission valve stem and rotating synchronously with the transmission valve stem, and a dial covering the pointer.

[0007] As a further improvement of this utility model, it also includes a mechanical digital display screen disposed in the dial. The mechanical digital display screen is provided with a digital rotation module that is connected to the pointer, so that the pointer can drive the digital display screen to change when it rotates one revolution.

[0008] As a further improvement of this utility model, the drive valve stem is provided with a first bevel gear, the valve plate valve stem is provided with a second bevel gear that meshes with the first bevel gear, and the transmission valve stem is provided with a third bevel gear that meshes with the first bevel gear.

[0009] As a further improvement of this utility model, the tooth ratio of the third bevel gear to the first bevel gear is 4:1, and the tooth ratio of the first bevel gear to the second bevel gear is 1:1.

[0010] As a further improvement of this utility model, the dial is provided with a first rotation mark area located within the working range of the pointer and a second rotation mark area adjacent to the first rotation mark area.

[0011] As a further improvement of this utility model, it also includes a protective shell, one end of the drive valve stem, the valve plate valve stem and the transmission valve stem all pass through the protective shell, and the dial is fixed on the protective shell.

[0012] As a further improvement of this utility model, both the transmission valve stem and the valve plate valve stem are connected to the protective shell through a sleeve.

[0013] As a further improvement of this utility model, the dial is provided with a detachably connected rated rotating digital display.

[0014] The beneficial effects of this utility model are: the rising or falling status of the valve plate can be clearly understood through pointers, dials, and mechanical digital displays, avoiding operational errors and unnecessary losses. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a structural cross-sectional view of the present invention;

[0017] Figure 2 This is a partial structural schematic diagram of the present invention.

[0018] Explanation of reference numerals in the attached figures:

[0019] 1-Valve handle, 2-Drive valve stem, 21-First bevel gear, 3-Valve plate stem, 31-Second bevel gear, 4-Transmission valve stem, 41-Third bevel gear, 5-Pointer, 6-Dial, 61-First rotation indicator area, 62-Second rotation indicator area, 63-Rated rotation number plate, 7-Mechanical digital display screen, 8-Protective shell, 9-Sleeve. Detailed Implementation

[0020] The accompanying drawings are for illustrative purposes only and should not be construed as limiting the scope of this patent. To better illustrate this embodiment, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product.

[0021] It will be understood by those skilled in the art that certain well-known structures and their descriptions may be omitted in the accompanying drawings. The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.

[0022] Reference Figure 1 and Figure 2A gate valve capable of displaying the valve plate opening status in real time includes a drive valve stem 2 that rotates synchronously with a valve handle 1, and a valve plate stem 3 that is pulsatorically connected to the drive valve stem 2 and can drive the valve plate to open and close. It also includes a transmission valve stem 4 pulsatorically connected to the drive valve stem 2, a pointer 5 mounted on the transmission valve stem 4 and rotating synchronously with it, and a dial 6 covering the pointer 5. The combination of the pointer 5 and the dial 6 allows for a clear understanding of the valve plate's rising or falling status, preventing operational errors and unnecessary losses.

[0023] As a further improvement of this utility model, it also includes a mechanical digital display screen 7 disposed within the dial 6. The mechanical digital display screen 7 contains a digital rotation module that is drively connected to the pointer 5, so that each rotation of the pointer 5 causes a change in the number displayed on the mechanical digital display screen 7. Using the mechanical digital display screen 7 can effectively improve the accuracy of displaying the valve plate opening status; each rotation of the pointer 5 increments the number on the mechanical digital display screen 7 by one. Of course, electronic detection can also be used, but the cost is higher.

[0024] Of course, a high gear ratio can also be used to make the pointer 5 reach the limit position of the valve plate in one revolution. In this case, there is no need for a mechanical digital display screen 7, and the valve plate opening status can be displayed by the dial 6 alone. However, the pointer rotation amplitude of this solution is small, and it is not easy to see whether the limit position has been reached.

[0025] As a further improvement of this utility model, the drive valve stem 2 is provided with a first bevel gear 21, the valve plate valve stem 3 is provided with a second bevel gear 31 that meshes with the first bevel gear 21, and the transmission valve stem 4 is provided with a third bevel gear 41 that meshes with the first bevel gear 21. In this way, the first bevel gear 21 and the third bevel gear 41 will accurately drive the pointer 5 to rotate in each meshing, so that the display of the mechanical digital display screen 7 is accurate and reliable.

[0026] As a further improvement of this utility model, the tooth ratio of the third bevel gear 41 to the first bevel gear 21 is 4:1, and the tooth ratio of the first bevel gear 21 to the second bevel gear 31 is 1:1. This utility model uses a DN100 24-turn non-circular stem gate valve, that is, after turning the handle 24 times, the valve plate is in the limit position. When the tooth ratio is 4:1, the mechanical digital display screen 7 shows 6, which indicates that the valve plate has reached the limit position.

[0027] As a further improvement of this utility model, the dial 6 is provided with a first rotation indicator area 61 located within the working range of the pointer 5 and a second rotation indicator area 62 adjacent to the first rotation indicator area 61. Since the valve handle 1 can still rotate slightly after reaching its limit number of rotations, the first rotation indicator area 61 and the second rotation indicator area 62 are needed to determine whether further rotation is necessary. When the pointer 5 is in the first rotation indicator area 61, it is still within a reasonable rotation angle. When the pointer 5 approaches the second rotation indicator area 62, it indicates that the valve plate has reached its limit position. At this time, the operator should stop rotating the valve handle 1 to avoid over-tightening, which could damage or deform the internal parts of the valve, thereby improving the service life of the valve.

[0028] As a further improvement of this utility model, it also includes a protective shell 8. One end of the drive valve stem 2, the valve plate valve stem 3, and the transmission valve stem 4 all pass through the protective shell 8, and the dial 6 is fixed on the protective shell 8. This serves to protect and fix the internal transmission components of the valve and to prevent dust accumulation.

[0029] As a further improvement of this utility model, both the transmission valve stem 4 and the valve plate valve stem 3 are connected to the protective shell 8 through the sleeve 9.

[0030] As a further improvement of this utility model, the dial 6 is provided with a detachably connected rated rotation number plate 63. The rated rotation number on the display dial is determined according to the gear ratio of the selected bevel gear; according to the above gear ratio, the rated rotation number on the display dial of this gate valve is 6.

[0031] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0032] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A gate valve capable of displaying the valve plate opening status in real time, comprising a drive valve stem (2) capable of rotating synchronously with a valve handle (1) and a valve plate stem (3) connected to the drive valve stem (2) and capable of driving the valve plate to open and close, characterized in that, It also includes a transmission valve stem (4) that is connected to the drive valve stem (2), a pointer (5) that is mounted on the transmission valve stem (4) and rotates synchronously with the transmission valve stem (4), and a dial (6) that covers the pointer (5).

2. A gate valve capable of real-time display of valve plate opening status according to claim 1, characterized in that, It also includes a mechanical digital display screen (7) set in the dial (6), and the mechanical digital display screen (7) is provided with a digital rotation module that is connected to the pointer (5) so that the pointer (5) can change the number on the mechanical digital display screen (7) when it rotates one revolution.

3. A gate valve capable of displaying the valve plate opening status in real time according to claim 1, characterized in that, The drive valve stem (2) is provided with a first bevel gear (21), the valve plate valve stem (3) is provided with a second bevel gear (31) that meshes with the first bevel gear (21), and the transmission valve stem (4) is provided with a third bevel gear (41) that meshes with the first bevel gear (21).

4. A gate valve capable of real-time display of valve plate opening status according to claim 3, characterized in that, The tooth ratio of the third bevel gear (41) to the first bevel gear (21) is 4:1, and the tooth ratio of the first bevel gear (21) to the second bevel gear (31) is 1:

1.

5. A gate valve capable of displaying the valve plate opening status in real time according to claim 1, characterized in that, The dial (6) has a first rotation indicator area (61) located within the working range of the pointer (5) and a second rotation indicator area (62) adjacent to the first rotation indicator area (61).

6. A gate valve capable of real-time display of valve plate opening status according to claim 1, characterized in that, It also includes a protective shell (8), one end of the drive valve stem (2), the valve plate valve stem (3) and the transmission valve stem (4) all pass through the protective shell (8), and the dial (6) is fixed on the protective shell (8).

7. A gate valve capable of displaying the valve plate opening status in real time according to claim 6, characterized in that, The transmission valve stem (4) and the valve plate valve stem (3) are both connected to the protective shell (8) through the sleeve (9).

8. A gate valve capable of displaying the valve plate opening status in real time according to claim 1, characterized in that, The dial (6) is provided with a detachably connected rated rotating digital plate (63).

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