Bidirectional buffering butterfly valve

Abstract

The utility model discloses a two-way buffer butterfly valve, which comprises a valve body, a valve seat, a valve rod and a valve plate, the valve rod is matched with the valve body in a rotating mode, the valve seat is arranged on the valve body, the valve plate is arranged on the valve rod, the two-way buffer butterfly valve further comprises a sealing ring, a sealing check ring and a graphite gasket, the sealing check ring is arranged on the valve plate, and the graphite gasket is arranged on the valve rod. The sealing ring is arranged between the valve plate and the sealing check ring, the graphite gaskets are arranged on the two sides of the sealing ring, the graphite gaskets are arranged between the sealing ring and the sealing check ring, the graphite gaskets are arranged between the valve plate and the sealing ring, the sealing ring is made of metal, and the sealing ring is used for making contact with the valve seat. The butterfly valve has the following beneficial effects that the whole butterfly valve has a better sealing effect, and the two sides of the butterfly valve can play a role in buffering during sealing.

Description

TECHNICAL FIELD

[0001] The utility model relates to valve field especially relates to a bidirectional buffering butterfly valve. BACKGROUND

[0002] The butterfly valve is a kind of valve currently commonly used, and a butterfly valve is disclosed in patent announcement document CN202708125U, the valve plate directly contacts sealing seat (also called valve seat) in this butterfly valve and is sealed, the valve plate directly contacts sealing seat and is sealed, which not only has poor sealing effect, but also has no buffer when sealing, and the sealing effect will be reduced after a period of use. UTILITY MODEL CONTENTS

[0003] The utility model provides a bidirectional buffering butterfly valve for the above problems, utilizes the sealing ring of metal material and contacts sealing seat and is sealed, and graphite gasket is arranged on the both sides of sealing ring, utilizes graphite gasket to improve sealing and buffers, so that the whole butterfly valve has better sealing effect, and both sides can buffer when sealing.

[0004] The technical scheme adopted by the utility model is as follows:

[0005] A kind of bidirectional buffering butterfly valve, including valve body, valve seat, valve rod and valve plate, the valve rod is rotatably connected with valve body, the valve seat is arranged on valve body, the valve plate is arranged on valve rod, further include sealing ring, sealing baffle ring and graphite gasket, the sealing baffle ring is arranged on valve plate, the sealing ring is arranged between valve plate and sealing baffle ring, the graphite gasket is arranged on the both sides of sealing ring, graphite gasket is arranged between sealing ring and sealing baffle ring, graphite gasket is arranged between valve plate and sealing ring, the sealing ring is the sealing ring of metal material, and the sealing ring is used to contact sealing seat.

[0006] In the butterfly valve, the valve plate and the valve seat are sealed by the sealing ring of metal material, the sealing is realized when the sealing ring contacts the valve seat, and the graphite gasket is arranged on the both sides of the sealing ring, the graphite gasket is arranged between the sealing ring and the sealing baffle ring, and the graphite gasket is arranged between the valve plate and the sealing ring. The graphite gasket can seal and buffer, so the graphite gasket on the both sides of the sealing ring of metal material can improve the sealing effect and provide a buffering effect when the valve is sealed.

[0007] As described above, the sealing ring of metal material contacts the valve seat to seal in the butterfly valve, and the graphite gasket is arranged on the both sides of the sealing ring, the graphite gasket is used to improve the sealing and buffer, so that the whole butterfly valve has better sealing effect, and both sides can buffer when sealing.

[0008] In the butterfly valve, the valve plate is fixed on the valve rod by the threaded pin.

[0009] Optionally, the valve body is provided with a spacer ring, a seat retainer and a circlip, the circlip is in close contact with the seat retainer, and the spacer ring is located between the seat retainer and the valve seat.

[0010] Optionally, the spacer ring is provided with a nut, and the nut is provided with a check screw, one end of the check screw is in contact with the seat retainer.

[0011] Optionally, the valve body is provided with an inspection chamber.

[0012] Optionally, one side of the valve body is provided with a blind plate thrust ring, and a graphite gasket is arranged between the blind plate thrust ring and the valve body.

[0013] The graphite gasket is used for sealing.

[0014] Optionally, the valve body is provided with a test blind plate, and the test blind plate is matched with the blind plate thrust ring through a mounting screw.

[0015] Optionally, the blind plate thrust ring comprises two half rings and a locking screw, and the two half rings are matched together through the locking screw.

[0016] Optionally, the valve body is provided with an elongated valve cover.

[0017] The beneficial effects of the utility model are that the sealing ring made of metal material is in contact with the valve seat for sealing, graphite gaskets are arranged on both sides of the sealing ring, the graphite gaskets are used for improving sealing and buffering, the whole butterfly valve has better sealing effect, and both sides can buffer during sealing. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments described in the utility model, and other drawings can be obtained by those skilled in the art according to these drawings.

[0019] Figure 1 is a structural schematic diagram of a bidirectional buffering butterfly valve;

[0020] Figure 2 is a schematic diagram of the installation relationship of a test blind plate;

[0021] Figure 3 is a schematic diagram of the cooperation relationship between a valve rod and a valve body;

[0022] Figure 4 is Figure 3 is an enlarged schematic diagram of A in the figure.

[0023] The reference signs in the drawings are as follows: 1, valve body; 2, valve plate; 3, valve rod; 4, valve seat; 5, seat retainer ring; 6, spacer ring; 7, sealing ring; 701, graphite gasket; 8, sealing retainer ring; 9, maintenance chamber; 10, snap spring; 11, test blind plate; 12, blind plate thrust ring; 13, loosening screw; 14, nut; 15, lengthened valve cover; 16, threaded pin; 17, graphite sealing gasket; 18, base; 19, mounting screw; 20, locking screw. DETAILED DESCRIPTION

[0024] In order to make the above objectives, characteristics and advantages of the present application more apparent, a detailed description of the specific embodiments of the present application will be given below with reference to the accompanying drawings.

[0025] In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, it will be apparent to one skilled in the art that the present application can be practiced without the specific details given in this description. In other instances, well-known methods, procedures and devices have not been described in detail so as not to unnecessarily obscure aspects of the present application.

[0026] In the description of the present application, it should be noted that the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. For ease of description, the sizes of the various parts shown in the drawings are not drawn in proportion to the actual proportions. The techniques, methods and devices known to those skilled in the relevant art can not be discussed in detail, but should be considered as part of the authorized description. In all examples shown and discussed herein, any specific value should be interpreted as merely exemplary and not as a limitation. Therefore, other examples of exemplary embodiments can have different values. It should be noted that similar reference signs and letters represent similar items in the following drawings, and therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0027] As shown in the drawings Figure 1 As shown in the drawings Figure 4 As shown in the drawings, a bidirectional buffering butterfly valve includes a valve body 1, a valve seat 4, a valve rod 3 and a valve plate 2, the valve rod 3 is rotationally connected with the valve body 1, the valve seat 4 is arranged on the valve body 1, the valve plate 2 is arranged on the valve rod 3, further including a sealing ring 7, a sealing retainer ring 8 and a graphite gasket 701, the sealing retainer ring 8 is arranged on the valve plate 2, the sealing ring 7 is arranged between the valve plate 2 and the sealing retainer ring 8, the graphite gasket 701 is arranged on both sides of the sealing ring 7, the graphite gasket 701 is arranged between the sealing ring 7 and the sealing retainer ring 8, the graphite gasket 701 is arranged between the valve plate 2 and the sealing ring 7, the sealing ring 7 is a metal sealing ring 7, and the sealing ring 7 is used to contact the valve seat 4.

[0028] In this type of butterfly valve, the valve plate 2 and the valve seat 4 are sealed by a metal sealing ring 7. When the sealing ring 7 contacts the valve seat 4, a seal is achieved. Graphite gaskets 701 are provided on both sides of the sealing ring 7. Graphite gaskets 701 are provided between the sealing ring 7 and the sealing retaining ring 8, and between the valve plate 2 and the sealing ring 7. The graphite gaskets 701 serve two purposes: sealing and buffering. Therefore, the presence of graphite gaskets 701 on both sides of the metal sealing ring 7 provides a better sealing effect and ensures that the valve has a buffering effect on both sides during sealing.

[0029] In summary, this type of butterfly valve uses a metal sealing ring 7 to seal against the valve seat 4, and graphite gaskets 701 are provided on both sides of the sealing ring 7. The graphite gaskets 701 improve the sealing and provide cushioning, resulting in a better sealing effect for the entire butterfly valve, and both sides can provide cushioning during sealing.

[0030] Specifically, in this type of butterfly valve, the valve plate 2 is fixed to the valve stem 3 by threaded pins 16.

[0031] As attached Figure 1 ~Appendix Figure 4 As shown, it also includes a spacer ring 6, a seat retainer ring 5, and a retaining spring 10. The spacer ring 6, the seat retainer ring 5, and the retaining spring 10 are disposed on the valve body 1. The retaining spring 10 is close to the seat retainer ring 5, and the spacer ring 6 is located between the seat retainer ring 5 and the valve seat 4.

[0032] As attached Figure 1 ~Appendix Figure 4 As shown, a nut 14 is provided on the spacer ring 6, and an anti-loosening screw is provided on the nut 14. One end of the anti-loosening screw is in contact with the seat retaining ring 5.

[0033] As attached Figure 1 ~Appendix Figure 4 As shown, a maintenance compartment is provided on valve body 1.

[0034] As attached Figure 1 ~Appendix Figure 4 As shown, a blind flange thrust ring 12 is provided on one side of the valve body 1, and a graphite sealing gasket 17 is provided between the blind flange thrust ring 12 and the valve body 1.

[0035] The function of the graphite gasket 17 is to provide a seal.

[0036] As attached Figure 1 ~Appendix Figure 4 As shown, it also includes a test blind plate 11, which is fitted together with a blind plate thrust ring 12 by mounting screws 19. A base 18 is provided at one end of the test blind plate 11.

[0037] As attached Figure 1 ~AppendixFigure 4 As shown, the blind plate thrust ring 12 comprises two half rings which are fitted together by locking screw 20.

[0038] As shown in the accompanying drawings, the valve body 1 is provided with an elongated valve cover 15. Figure 1 As shown in the accompanying drawings, the valve body 1 is provided with an elongated valve cover 15. Figure 4 As shown, the valve body 1 is provided with an elongated valve cover 15.

[0039] The above-mentioned embodiments only express part of the embodiments of the present application, and the description is more specific and detailed, but it should not be understood as a limitation on the scope of the patent of the present application. It should be pointed out that for those skilled in the art, the technical solutions recorded in the foregoing embodiments can still be modified, or some technical features can be replaced equivalently. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A bidirectional cushion butterfly valve, comprising a valve body, a valve seat, a valve stem and a valve plate, the valve stem and the valve body are rotationally coupled together, the valve seat is arranged on the valve body, and the valve plate is arranged on the valve stem, characterized in that, Further comprising a sealing ring, a sealing block and a graphite gasket, the sealing block is arranged on the valve plate, the sealing ring is arranged between the valve plate and the sealing block, the graphite gasket is arranged on both sides of the sealing ring, the graphite gasket is arranged between the sealing ring and the sealing block, the graphite gasket is arranged between the valve plate and the sealing ring, the sealing ring is a metal sealing ring, and the sealing ring is used to contact the valve seat.

2. A bi-directional cushion butterfly valve according to claim 1, wherein, Further comprising a spacer ring, a seat block and a snap spring, the spacer ring, the seat block and the snap spring are arranged on the valve body, the snap spring is in close contact with the seat block, and the spacer ring is located between the seat block and the valve seat.

3. A bi-directional cushion butterfly valve according to claim 2, wherein, A nut is arranged on the spacer ring, and a check screw is arranged on the nut, the check screw is in contact with the valve seat.

4. A bi-directional cushion butterfly valve according to claim 1, wherein, The valve body is provided with an inspection chamber.

5. A bi-directional cushion butterfly valve according to claim 1, wherein, A blind plate thrust ring is arranged on one side of the valve body, and a graphite sealing gasket is arranged between the blind plate thrust ring and the valve body.

6. A bi-directional cushion butterfly valve according to claim 5, wherein, Further comprising a test blind plate, the test blind plate is matched with the blind plate thrust ring through mounting screws, and one end of the test blind plate is provided with a base.

7. A bi-directional cushion butterfly valve according to claim 5, wherein, The blind plate thrust ring comprises two half rings and a locking screw, and the two half rings are matched together through the locking screw.

8. A bi-directional cushion butterfly valve according to claim 1, wherein, The valve body is provided with an elongated valve cover.

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