Pressure regulating butterfly valve for communicating pipe of steam turbine

Abstract

The utility model discloses a pressure regulating butterfly valve for a communicating pipe of a steam turbine, which belongs to the technical field of butterfly valves and comprises a butterfly valve body, a fixing box is fixedly connected to the top of the butterfly valve body, a valve rod is rotatably connected to the bottom end in the fixing box, and a butterfly plate and a first bevel gear are fixedly connected to the surface of the valve rod. The butterfly plate is located in the butterfly valve body, the first bevel gear is located in a fixing box, and the inner side face of the fixing box is rotationally connected with a transmission rod through a bearing. The butterfly valve has the beneficial effects that by arranging the rotating cylinder, people can open and close the butterfly valve body by pulling the rotating cylinder, after screwing is completed, the rotating cylinder is loosened, under the action of the limiting spring, the positioning block can be clamped in the positioning hole again, the position of the rotating cylinder can be stabilized, and then the butterfly valve body can be opened and closed through limiting of the rotating cylinder. And the positions of the knob, the transmission rod and the first bevel gear can be stabilized, so that people can conveniently stabilize the position of the valve rod, and the use is more convenient.

Description

TECHNICAL FIELD

[0001] The utility model relates to butterfly valve technical field more specifically, it relates to a steam turbine communication pipe pressure regulating butterfly valve. BACKGROUND

[0002] The butterfly valve is also called flap valve, is a simple structure regulating valve, can be used for low pressure pipeline medium switch control butterfly valve is to refer to the closing piece as a disc, rotates around the valve shaft to achieve opening and closing a kind of valve, valve can be used to control air, water, steam, various corrosive media, mud, oil, liquid metal and radioactive medium and various types of fluid flow, mainly plays off and throttling effect on pipeline, butterfly valve opening and closing element is a disc-shaped butterfly plate, rotates in the valve body around its own axis, to achieve opening and closing or regulating purposes, pressure regulating butterfly valve is widely installed in steam turbine, low pressure communication pipe, to control the pipeline pressure to meet the heating requirements.

[0003] However, the valve rod in some regulating butterfly valves is often exposed to the outside, the valve rod is easily affected by external factors, which leads to rotation, reduces the stability of the butterfly valve during use, and when the valve rod adjusts the valve plate in the valve body to the maximum opening or closure, it is more troublesome to fix the valve rod, and it is inconvenient to use, therefore, in view of the above problems, a steam turbine communication pipe pressure regulating butterfly valve is provided. Utility model content

[0004] (1) technical problem to be solved

[0005] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a steam turbine communication pipe pressure regulating butterfly valve, which has a fixing structure, and is convenient for people to fix the position of the valve rod.

[0006] (2) technical scheme

[0007] In order to achieve the above object, the utility model provides a steam turbine communication pipe pressure regulating butterfly valve, including butterfly valve main part, the fixed box is fixedly connected to butterfly valve main part top, the valve rod is rotatably connected through the inside bottom of fixed box, the valve rod surface is fixedly connected with butterfly plate and first bevel gear, the butterfly plate is in butterfly valve main part, the first bevel gear is in fixed box, the transmission rod is rotatably connected through the inside side of fixed box, the transmission rod surface is fixedly connected with second bevel gear, the second bevel gear is intermeshed with first bevel gear, one end of transmission rod rotates and passes through the side of fixed box, and is fixedly connected with rotating ring, the rotating ring side is fixedly connected with knob, the fixed ring is fixedly connected to the side of fixed box, the fixed ring is coaxial with rotating ring, a plurality of contraction grooves are set up in the inside of rotating ring, a plurality of locating holes are set up in the inside of fixed ring, the inside side of contraction groove is slidably connected with slide rod, the both ends of slide rod are fixedly connected with locating block and circular ring respectively, the one end of locating block is clamped in locating hole, the circular ring side is fixedly connected with rotary cylinder, the rotary cylinder is slidably connected on the rotating surface, the surface of slide rod is sleeved with limiting spring, the both ends of limiting spring are fixedly connected with the inside side of contraction groove and the side of locating block respectively.

[0008] When using the steam turbine communication pipe pressure regulating butterfly valve of the technical scheme, the rotary cylinder is set, people pull the rotary cylinder, the butterfly valve main body can be opened and closed, after twisting, the rotary cylinder is loosened under the action of the limiting spring, the locating block can be clamped in the locating hole again, the position of the rotary cylinder can be stabilized, then the positions of the knob, the transmission rod and the first bevel gear can be stabilized through the limiting of the rotary cylinder, so that the position of the valve rod can be stabilized, and the steam turbine communication pipe pressure regulating butterfly valve is more convenient to use.

[0009] Further, the valve rod top is fixedly connected with a rotating rod.

[0010] Further, the rotating rod top rotates through the fixed box top and is fixedly connected with a pointer.

[0011] Further, the fixed box top is fixedly connected with an annular scale plate.

[0012] Further, the butterfly valve main body both ends are fixedly connected with mounting discs.

[0013] Further, the mounting disc inside is provided with a plurality of mounting holes, and the mounting disc side is fixedly connected with a sealing ring.

[0014] (3) beneficial effects

[0015] In summary, the utility model has the following beneficial effects:

[0016] 1. The steam turbine communication pipe pressure regulating butterfly valve, by setting the rotating cylinder, people pull the rotating cylinder, can open and close the butterfly valve body, after the screw is completed, loosen the rotating cylinder under the action of the limiting spring, the positioning block can be reconnected in the positioning hole, the position of the rotating cylinder can be stabilized, then through the limiting of the rotating cylinder, the position of the knob, the transmission rod and the first bevel gear can be stabilized, so that people can stabilize the position of the valve rod, and it is more convenient to use;

[0017] 2. The steam turbine communication pipe pressure regulating butterfly valve, by setting the pointer and the annular scale plate, when rotating the valve rod, under the action of the pointer and the annular scale plate, it is convenient for people to accurately control the rotation angle of the valve rod. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the specific embodiment of the present application or the technical scheme in the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiment or the prior art. Obviously, the drawings described below are only one embodiment of the present application, and those skilled in the art can obtain other drawings according to these drawings without creating labor.

[0019] Figure 1 It is the structure schematic view of the front view of the present application;

[0020] Figure 2 It is the structure schematic view of the front view section of the present application;

[0021] Figure 3 It is the structure schematic view of the fixed box section of the present application;

[0022] Figure 4 It is Figure 3 The structure schematic view of the enlarged structure of A in the present application.

[0023] The marks in the drawings are:

[0024] 1, butterfly valve body; 101, butterfly plate;

[0025] 2, mounting disc; 201, mounting hole; 202, sealing ring;

[0026] 3, fixed box; 301, valve rod; 302, first bevel gear; 303, rotating rod; 304, pointer; 305, annular scale plate; 306, transmission rod; 307, second bevel gear; 308, rotating ring; 309, knob; 3010, positioning ring; 3011, positioning hole; 3012, contraction groove; 3013, sliding rod; 3014, positioning block; 3015, ring; 3016, rotating cylinder; 3017, limiting spring. DETAILED DESCRIPTION

[0027] In order to make the technical means, creation features, purposes and effects of the utility model easy to understand, the technical solutions in the specific embodiments of the utility model are described clearly and completely below to further illustrate the utility model. Obviously, the described specific embodiments are only a part of the embodiments of the utility model, rather than all the modes.

[0028] Embodiment

[0029] The following will be described in detail with reference to the accompanying drawings Figures 1-4 The utility model is further described in detail.

[0030] Please refer to Figures 1-4 The utility model provides a technical scheme: a steam turbine communication pipe pressure regulating butterfly valve, including butterfly valve main body 1, butterfly valve main body 1 top fixedly connected with fixed box 3, the inside bottom of fixed box 3 is connected with valve stem 301 through rotation, valve stem 301 surface fixedly connected with butterfly plate 101 and first bevel gear 302, butterfly plate 101 is in butterfly valve main body 1, and first bevel gear 302 is in fixed box 3, the inside side of fixed box 3 is connected with transmission rod 306 through bearing rotation, transmission rod 306 surface fixedly connected with second bevel gear 307, and second bevel gear 307 and first bevel gear 302 are mutually engaged, and transmission rod 306 one end rotation passes through the side of fixed box 3, and fixedly connected with rotating ring 308, and rotating ring 308 side fixedly connected with knob 309, and fixed box 3 side fixedly connected with positioning ring 3010, and positioning ring 3010 and rotating ring 308 are coaxial, and a plurality of contraction grooves 3012 are set in rotating ring 308, a plurality of positioning holes 3011 are set in the inside of positioning ring 3010, and the inside side of contraction groove 3012 is slidably connected with slide rod 3013, and slide rod 3013 both ends are fixedly connected with positioning block 3014 and annular ring 3015 respectively, and positioning block 3014 one end is clamped in positioning hole 3011, and annular ring 3015 side fixedly connected with rotary cylinder 3016, and rotary cylinder 3016 is slidably connected on the surface of rotation, and the surface of slide rod 3013 is sleeved with limiting spring 3017, and limiting spring 3017 both ends are fixedly connected with the inside side of contraction groove 3012 and the side of positioning block 3014 respectively.

[0031] By adopting the above technical scheme, by setting rotary cylinder 3016, people pull rotary cylinder 3016, can open and close butterfly valve main body 1, after screwing, rotary cylinder 3016 is loosened under the action of limiting spring 3017, positioning block 3014 can be clamped in positioning hole 3011 again, can stabilize the position of rotary cylinder 3016, then through the limiting of rotary cylinder 3016, the position of knob 309, transmission rod 306 and first bevel gear 302 can be stabilized, so that people can stabilize the position of valve stem 301, and it is more convenient to use.

[0032] Referring to Figure 2 , the top end of the valve rod 301 is fixedly connected with a rotating rod 303, the top end of the rotating rod 303 is rotatably arranged through the top of the fixed box 3, and the pointer 304 is fixedly connected with the top of the fixed box 3. The top of the fixed box 3 is fixedly connected with an annular scale plate 305.

[0033] By adopting the above technical scheme, by arranging the pointer 304 and the annular scale plate 305, when the valve rod 301 is rotated, the rotation angle of the valve rod 301 can be accurately controlled under the action of the pointer 304 and the annular scale plate 305.

[0034] Referring to Figure 1 and Figure 3 , the both ends of the butterfly valve body 1 are fixedly connected with the mounting disc 2, a plurality of mounting holes 201 are arranged in the mounting disc 2, and the sealing ring 202 is fixedly connected to the side surface of the mounting disc 2.

[0035] The working principle of the utility model is as follows:

[0036] When the valve rod 301 needs to be rotated, the rotating cylinder 3016 is pulled, so that the positioning block 3014 is separated from the positioning hole 3011, after the separation is completed, the rotating cylinder 3016 is twisted, the rotating transmission rod 306 and the second bevel gear 307 can be driven to rotate, the valve rod 301 can be driven to rotate through the meshing of the second bevel gear 307 and the first bevel gear 302, so that the butterfly valve body 1 can be conveniently opened and closed, and the rotation angle of the valve rod 301 can be accurately controlled under the action of the pointer 304 and the annular scale plate 305.

[0037] After the twisting is completed, the rotating cylinder 3016 is loosened, the positioning block 3014 can be reconnected in the positioning hole 3011 under the action of the limiting spring 3017, the position of the rotating cylinder 3016 can be stabilized, then the positions of the knob 309, the transmission rod 306 and the first bevel gear 302 can be stabilized through the limiting of the rotating cylinder 3016, so that the position of the valve rod 301 can be stabilized, and the utility model is more convenient to use.

[0038] The embodiment is only an explanation of the utility model, and is not a limitation of the utility model, and the person skilled in the art can make a modification without creative contribution according to the needs after reading the specification, but as long as the modification is within the scope of the claims of the utility model, the modification is protected by the patent law.

Claims

1. A pressure regulating butterfly valve for a steam turbine connecting pipe, comprising a butterfly valve body (1), characterized in that: The butterfly valve body (1) top fixedly connected with fixed box (3), the fixed box (3) inside bottom end is rotatably connected with valve rod (301), the valve rod (301) surface fixedly connected with butterfly plate (101) and first bevel gear (302), the butterfly plate (101) is in butterfly valve body (1), the first bevel gear (302) is in fixed box (3), the fixed box (3) inside side is rotatably connected with transmission rod (306), the transmission rod (306) surface fixedly connected with second bevel gear (307), the second bevel gear (307) and first bevel gear (302) are mutually engaged, the transmission rod (306) one end rotatably passes through fixed box (3) side, and fixedly connected with rotating ring (308), the rotating ring (308) side fixedly connected with knob (309), the fixed box (3) side fixedly connected with positioning ring (3010), the positioning ring (3010) and rotating ring (308) coaxial, the rotating ring (308) inside is provided with a plurality of shrinkage grooves (3012), the positioning ring (3010) inside is provided with a plurality of positioning holes (3011), the shrinkage groove (3012) inside side is slidably connected with slide rod (3013), the slide rod (3013) both ends are fixedly connected with positioning block (3014) and circular ring (3015) respectively, the positioning block (3014) one end is clamped in the positioning hole (3011), the circular ring (3015) side fixedly connected with rotary cylinder (3016), the rotary cylinder (3016) is slidably connected on the rotating surface, the slide rod (3013) surface is sleeved with limiting spring (3017), the limiting spring (3017) both ends are fixedly connected in the shrinkage groove (3012) inside side and the positioning block (3014) side.

2. A pressure regulating butterfly valve for a connecting pipe of a steam turbine according to claim 1, characterized in that: The valve rod (301) top is fixedly connected with rotating rod (303).

3. A pressure regulating butterfly valve for a connecting pipe of a steam turbine according to claim 2, characterized in that: The rotating rod (303) top rotatably passes through the top of fixed box (3), and is fixedly connected with pointer (304).

4. A pressure regulating butterfly valve for a connecting pipe of a steam turbine according to claim 1, characterized in that: The top of fixed box (3) is fixedly connected with annular scale plate (305).

5. A pressure regulating butterfly valve for a steam turbine connecting pipe according to claim 1, characterized in that: Both ends of the butterfly valve body (1) are fixedly connected with mounting disc (2).

6. A pressure regulating butterfly valve for a steam turbine connecting pipe according to claim 5, characterized in that: The mounting disc (2) is rotatably connected with valve rod (301). The mounting disc (2) inside is provided with a plurality of mounting holes (201), and the mounting disc (2) side is fixedly connected with sealing ring (202).

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