A connection structure between a wedge-type double gate plate and a valve stem with a butterfly spring

Abstract

The present application belongs to the field of valve technology, and specifically relates to a connection structure between a wedge-type double gate with a butterfly spring and a valve stem. A connection structure between a wedge-type double gate with a butterfly spring and a valve stem comprises a gate 1# and a gate 2#, and a butterfly spring is respectively arranged on the A surface of the gate 1# and the B surface of the gate 2#. After the butterfly spring is compressed at the bottom of the valve stem, it contacts with the gate 1# and the gate 2#, thereby transmitting the load to the gate 1# and the gate 2#. The significant effect of the present application is that since a butterfly spring is arranged between the valve stem and the gate, the height difference between the upper A surface of the gate 1# and the upper B surface of the gate 2# caused by the processing error is automatically compensated by the butterfly spring, so that the valve stem load is evenly transmitted to the gate 1# and the gate 2#, thereby improving the sealing performance of the valve. Since the gap X between the valve stem T-head and the gate T-slot is less than the depth Y of the circular groove, the butterfly spring will never fall off the circular groove.

Description

Technical Field

[0001] The present application belongs to the field of valve technology, and specifically relates to a connection structure between a wedge-type double gate plate with a butterfly spring and a valve stem. Background Art

[0002] Common wedge-type double gate and valve stem connection structure such as Figure 1 As shown in the figure, the upper part of gate plate 1# and gate plate 2# are connected to the valve stem through T-slots to transfer the axial load of the valve stem. Due to machining errors, the upper surface A of gate plate 1# and the upper surface B of gate plate 2# cannot be completely on the same horizontal line. There is a certain height difference between surface A and surface B. In this way, the valve stem cannot be in close contact with gate plate 1# and gate plate 2# at the same time. The load transmitted by the valve stem to gate plate 1# and gate plate 2# is uneven, which will affect the sealing performance of the valve. Summary of the invention

[0003] The purpose of this application is to address the defects of the prior art and provide a connection structure between a wedge-type double gate plate and a valve stem with a butterfly spring, which can automatically compensate for the height difference between the upper A surface of gate plate 1# and the upper B surface of gate plate 2# caused by processing errors, so that the valve stem load is evenly transmitted to gate plate 1# and gate plate 2#, thereby improving the valve sealing performance.

[0004] The technical solution of the present application is: a connection structure of a wedge-type double gate with a butterfly spring and a valve stem, including gate 1# and gate 2#, a butterfly spring is respectively arranged on the A surface of gate 1# and the B surface of gate 2#, and the bottom of the valve stem compresses the butterfly spring and then contacts with gate 1# and gate 2# to transfer the load to gate 1# and gate 2#.

[0005] As described above, a connection structure of a wedge-type double gate with a butterfly spring and a valve stem, wherein a circular groove of the same size is respectively set on the contact area between the A surface of gate plate 1# and the B surface of gate plate 2# and the valve stem, a butterfly spring of the same size is placed in the circular groove, and the gap X between the T-shaped head of the valve stem and the T-shaped groove of the gate plate is smaller than the depth Y of the circular groove.

[0006] In the connection structure of the wedge-type double gate with butterfly spring and valve stem as described above, the gap X between the valve stem T-shaped head and the gate T-shaped groove is smaller than the depth Y of the circular groove.

[0007] The significant effect of the present application is that, since a butterfly spring is arranged between the valve stem and the gate plate, the butterfly spring automatically compensates for the height difference between the upper surface A of gate plate 1# and the upper surface B of gate plate 2# caused by the processing error, so that the valve stem load is evenly transmitted to gate plates 1# and 2#, thereby improving the sealing performance of the valve. Since the gap X between the valve stem T-shaped head and the gate plate T-shaped groove is less than the depth Y of the circular groove, the butterfly spring will never fall off the circular groove. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 The connection structure of the wedge-type double gate and the valve stem in the prior art.

[0009] Figure 2 The connection structure of the wedge-type double gate with butterfly spring and the valve stem.

[0010] In the figure: 1 gate 1#; 2 gate 2#; 3 valve stem; 4 butterfly spring. DETAILED DESCRIPTION

[0011] The present application is further described below with reference to the accompanying drawings:

[0012] As shown in the attached drawings, a connection structure of a wedge-type double gate with a butterfly spring and a valve stem is provided, wherein a circular groove of the same size is designed in the contact area between the A surface of gate 1# and the B surface of gate 2# and the valve stem, and a butterfly spring of the same size is placed in the circular groove, and the gap X between the T-shaped head of the valve stem and the T-shaped groove of the gate is smaller than the depth Y of the circular groove.

[0013] The technical features of the present invention are as follows: Since a butterfly spring is arranged between the valve stem and the gate plate, the butterfly spring automatically compensates for the height difference between the upper surface A of gate plate 1# and the upper surface B of gate plate 2# caused by the processing error, so that the valve stem load is evenly transmitted to gate plates 1# and 2#, thereby improving the sealing performance of the valve. Since the gap X between the valve stem T-shaped head and the gate plate T-shaped groove is less than the depth Y of the circular groove, the butterfly spring will never fall off the circular groove.

Claims

1. A connection structure between a wedge-type double gate with a butterfly spring and a valve stem, comprising a gate 1# and a gate 2#, characterized in that: A butterfly spring is respectively arranged on the A surface of gate plate 1# and the B surface of gate plate 2#. After the butterfly spring is compressed by the bottom of the valve stem, it contacts with gate plate 1# and gate plate 2# and then transmits the load to gate plate 1# and gate plate 2#; A circular groove of the same size is respectively provided in the contact area between the A surface of gate plate 1# and the B surface of gate plate 2# and the valve stem, and a butterfly spring of the same size is placed in the circular groove. The gap X between the T-shaped head of the valve stem and the T-shaped groove of the gate plate is smaller than the depth Y of the circular groove.

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