Butterfly valve with double valve rods

Abstract

The utility model relates to the technical field of butterfly valves, in particular to a double-valve-rod butterfly valve which comprises a valve body and a fixing hole, the fixing hole is machined in the inner wall of the valve body, the upper end of the valve body is fixedly connected with an upper pressing disc through a bolt, the lower end of the valve body is fixedly connected with a lower pressing disc through a bolt, and the outer wall of the valve body is fixedly connected with a silica gel sealing strip. And the upper end of the upper pressure plate is connected with a main control mechanism. The first rotating handle is manually pulled to drive the second bevel gear to rotate, the second bevel gear drives the upper valve rod at the lower end of the first bevel gear to rotate, the second rotating handle is manually pulled to drive the lower valve rod to rotate, and the lower valve rod can drive the second butterfly plate to rotate on the inner wall of the valve body. The inside of the valve body is divided into the first butterfly plate and the second butterfly plate which rotate in the valve body to open and close the valve, the upper space and the lower space of the butterfly valve can be singly opened, and the double valve rods can be better controlled to control the pressure of the flow speed of the butterfly valve.

Description

TECHNICAL FIELD

[0001] The utility model relates to butterfly valve field technical field, concretely is a double valve rod butterfly valve. BACKGROUND

[0002] The butterfly valve is simple in structure, small in size and light in weight, and is composed of only a few parts. Moreover, the butterfly valve can be quickly opened and closed by rotating 90 degrees, and the operation is simple. The butterfly valve has good fluid control characteristics. The butterfly plate of the butterfly valve is installed in the diameter direction of the pipeline. In the cylindrical passage of the butterfly valve body, the disc-shaped butterfly plate rotates around the axis, and the rotation angle is between 0 and 90 degrees. When the rotation angle is 90 degrees, the valve is in a fully open state.

[0003] For example, a double valve rod butterfly valve with the authorization announcement number "CN206017765U", although it solves the problem of the existing double valve rod butterfly valve, maintenance during shutdown, hindering production, and increasing cost. The above-mentioned valve is opened by a hand wheel or a motor, and the medium flows from one side of the butterfly valve to the other side. When the upper valve rod and the disc plate are separated, the handle can be rotated to drive the lower valve rod to open and close the valve. Considering the existing double valve rod butterfly valve, the flow through the butterfly valve on the valve needs to be opened as a whole, and the upper and lower spaces of the butterfly valve cannot be opened singly, which causes difficulty in controlling the flow rate and pressure of the double valve rod butterfly valve. CONTENT OF THE UTILITY MODEL

[0004] The utility model aims at solving the problem of the existing double valve rod butterfly valve, which cannot open the upper and lower spaces of the butterfly valve singly, resulting in difficulty in controlling the flow rate and pressure of the double valve rod butterfly valve, and proposes a double valve rod butterfly valve.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a double valve rod butterfly valve, comprising a valve body and a fixing hole, the inner wall of the valve body is processed with a fixing hole, the upper end of the valve body is fixedly connected with an upper pressure plate through bolts, the lower end of the valve body is fixedly connected with a lower pressure plate through bolts, the outer wall of the valve body is fixedly connected with a silica gel sealing strip, and the upper end of the upper pressure plate is connected with a main control mechanism.

[0006] Preferably, the main control mechanism comprises an upper valve rod, the outer wall of the upper valve rod is rotatably connected with the upper pressure plate, the inner wall of the upper valve rod is fixedly connected with a first butterfly plate, the upper end of the upper valve rod is fixedly connected with a first bevel gear, and the outer wall of the first bevel gear is engaged with a second bevel gear.

[0007] Preferably, the outer wall of the second bevel gear is fixedly connected with a first rotating handle, a protection box is installed at the upper end of the upper pressure plate, and the lower end of the valve body is connected with a secondary control mechanism.

[0008] Preferably, the auxiliary control mechanism comprises a lower valve rod, the outer wall of the lower valve rod is rotationally connected with the lower pressing disc, the inner wall of the lower valve rod is fixedly connected with the second butterfly plate, and the outer wall of the lower valve rod is abutted with the threaded rod.

[0009] Preferably, the end of the lower valve rod is fixedly connected with the second handle, and the outer wall of the threaded rod is threadedly connected with the lower pressing disc.

[0010] Preferably, the lower end of the upper pressing disc is rotationally connected with the lower pressing disc.

[0011] The double-valve-rod butterfly valve has the beneficial effects that the first handle is manually moved to drive the second bevel gear to rotate, the second bevel gear drives the upper valve rod at the lower end of the first bevel gear to rotate, the second handle is manually moved to drive the lower valve rod to rotate, the lower valve rod drives the second butterfly plate to rotate on the inner wall of the valve body, the valve body is switched by the rotation of the upper and lower first butterfly plates and the second butterfly plate in the valve body, the upper and lower spaces of the butterfly valve can be opened, and the flow rate and pressure of the double-valve-rod butterfly valve can be better controlled. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is a structural schematic view of the utility model;

[0013] Figure 2 It is a Figure 1 schematic view of a middle side sectional structure;

[0014] Figure 3 It is a Figure 1 schematic view of a middle front sectional structure;

[0015] Figure 4 It is a Figure 3 schematic view of an enlarged structure at A in the middle;

[0016] Figure 5 It is a Figure 3 schematic view of an enlarged structure at B in the middle;

[0017] Figure 6 It is a Figure 2 schematic view of an enlarged structure at C in the middle.

[0018] In the drawing: 1, valve body, 2, fixed hole, 3, upper pressing disc, 4, lower pressing disc, 5, silica gel sealing strip, 6, main control mechanism, 601, upper valve rod, 602, first butterfly plate, 603, first bevel gear, 604, second bevel gear, 7, first handle, 8, protection box, 9, auxiliary control mechanism, 901, lower valve rod, 902, second butterfly plate, 903, threaded rod, 10, second handle. DETAILED DESCRIPTION

[0019] The utility model will be further described in connection with the drawings:

[0020] Embodiment 1: Please refer to Figures 1-6 In this embodiment, a double valve rod butterfly valve includes a valve body 1 and a fixed hole 2, the inner wall of the valve body 1 is processed with the fixed hole 2, the upper end of the valve body 1 is fixedly connected with an upper pressure plate 3 through bolts, the lower end of the valve body 1 is fixedly connected with a lower pressure plate 4 through bolts, the outer wall of the valve body 1 is fixedly connected with a silica gel sealing strip 5, and the upper end of the upper pressure plate 3 is connected with a main control mechanism 6.

[0021] The main control mechanism 6 includes an upper valve rod 601, the first handle 7 is manually turned to drive the second bevel gear 604 to rotate, the second bevel gear 604 drives the upper valve rod 601 at the lower end of the first bevel gear 603 to rotate, the upper part of the valve body is opened, the outer wall of the upper valve rod 601 is rotationally connected with the upper pressure plate 3, the inner wall of the upper valve rod 601 is fixedly connected with a first butterfly plate 602, the upper end of the upper valve rod 601 is fixedly connected with the first bevel gear 603, and the outer wall of the first bevel gear 603 is engaged with the second bevel gear 604.

[0022] The first handle 7 is manually turned to drive the second bevel gear 604 to rotate, the second bevel gear 604 drives the upper valve rod 601 at the lower end of the first bevel gear 603 to rotate, the second handle 10 is manually turned to drive the lower valve rod 901 to rotate, and the lower valve rod 901 drives the second butterfly plate 902 to rotate in the inner wall of the valve body 1, so that the valve body 1 is divided into the first butterfly plate 602 and the second butterfly plate 902 in the valve body 1 to rotate to open and close the valve, the upper and lower spaces of the butterfly valve can be opened, and the flow rate and pressure of the double valve rod butterfly valve can be better controlled.

[0023] The outer wall of the second bevel gear 604 is fixedly connected with the first handle 7, the upper end of the upper pressure plate 3 is provided with a protection box 8, the lower end of the valve body 1 is connected with a secondary control mechanism 9, the second handle 10 is manually turned to drive the lower valve rod 901 to rotate, the lower valve rod 901 drives the second butterfly plate 902 to rotate in the inner wall of the valve body 1, so that the lower part of the valve body 1 is opened, the secondary control mechanism 9 includes the lower valve rod 901, the outer wall of the lower valve rod 901 is rotationally connected with the lower pressure plate 4, the inner wall of the lower valve rod 901 is fixedly connected with the second butterfly plate 902, and the outer wall of the lower valve rod 901 is in abutment with a threaded rod 903.

[0024] The end of the lower valve rod 901 is fixedly connected with the second handle 10, the outer wall of the threaded rod 903 is threadedly connected with the lower pressure plate 4, and the lower end of the upper pressure plate 3 is rotationally connected with the lower pressure plate 4.

[0025] Working principle:

[0026] When the pipeline is in the state of flow, the first knob 7 is manually turned to drive the second bevel gear 604 to rotate, the second bevel gear 604 drives the upper valve rod 601 at the lower end of the first bevel gear 603 to rotate, the upper valve rod 601 drives the first butterfly plate 602 to rotate on the inner wall of the valve body 1, the upper end of the valve body 1 is in the open state, and the lower end of the first butterfly plate 602 rotates on the second butterfly plate 902, the threaded rod 903 is rotated on the lower pressing disc 4, the end of the threaded rod 903 is separated from the lower valve rod 901, the second knob 10 is manually turned to drive the lower valve rod 901 to rotate, the lower valve rod 901 drives the second butterfly plate 902 to rotate on the inner wall of the valve body 1, the lower end of the valve body 1 is in the open state, the first butterfly plate 602 and the second butterfly plate 902 are separated in the valve body 1, and the valve is opened and closed by rotating in the valve body 1, so that the work is better completed.

[0027] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A double valve stem butterfly valve, comprising a valve body (1) and a fixed hole (2), the inner wall of the valve body (1) is processed with a fixed hole (2), characterized in that: The upper end of the valve body (1) is fixedly connected with the upper pressing disc (3) through bolts, the lower end of the valve body (1) is fixedly connected with the lower pressing disc (4) through bolts, the outer wall of the valve body (1) is fixedly connected with the silica gel sealing strip (5), and the upper end of the upper pressing disc (3) is connected with the main control mechanism (6).

2. The dual stem butterfly valve of claim 1, wherein: The main control mechanism (6) comprises an upper valve rod (601), the outer wall of the upper valve rod (601) is rotationally connected with the upper pressing disc (3), the inner wall of the upper valve rod (601) is fixedly connected with a first butterfly plate (602), the upper end of the upper valve rod (601) is fixedly connected with a first bevel gear (603), and the outer wall of the first bevel gear (603) is engaged with a second bevel gear (604).

3. The dual stem butterfly valve of claim 2, wherein: The outer wall of the second bevel gear (604) is fixedly connected with a first rotating handle (7), the upper end of the upper pressing disc (3) is provided with a protection box (8), and the lower end of the valve body (1) is connected with a secondary control mechanism (9).

4. The dual stem butterfly valve of claim 3, wherein: The secondary control mechanism (9) comprises a lower valve rod (901), the outer wall of the lower valve rod (901) is rotationally connected with the lower pressing disc (4), the inner wall of the lower valve rod (901) is fixedly connected with a second butterfly plate (902), and the outer wall of the lower valve rod (901) is abuttingly connected with a threaded rod (903).

5. The dual stem butterfly valve of claim 4, wherein: The end of the lower valve rod (901) is fixedly connected with a second rotating handle (10), and the outer wall of the threaded rod (903) is threadedly connected with the lower pressing disc (4).

6. The dual stem butterfly valve of claim 1, wherein: The lower end of the upper pressing disc (3) is rotationally connected with the lower pressing disc (4).

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