Double-water-cooling butterfly valve

Abstract

The utility model discloses a double-water-cooling butterfly valve, relates to adjustment of gas in a purified gas flue and a crude gas flue of a calcium carbide furnace, and aims to provide a double-water-cooling butterfly valve in which water cooling channels can be arranged in a valve seat and a valve clack. The double-water-cooling butterfly valve comprises the valve seat, the valve clack and a valve rod, a hollow channel through which cooling water can pass is formed in the middle of the valve seat; a valve seat water inlet and a valve seat water outlet are formed in the valve seat; the valve seat water inlet and the valve seat water outlet are formed in the two sides of the center line, where the valve clack is installed, of the valve seat correspondingly. The valve clack is of a double-layer structure and comprises a valve clack body, an upper valve clack connecting groove and a lower valve clack connecting groove. A plurality of reinforcing ribs are arranged in the valve clack and are arranged in a staggered manner, and one end of each reinforcing rib is not sealed, so that cooling water can pass through the valve clack in a bypassing manner; the valve rod comprises an upper valve rod body and a lower valve rod body, the upper valve rod body and the lower valve rod body are both arranged in a double-layer mode, a water outlet pipeline is arranged in the upper valve rod body, and a water inlet pipeline is arranged in the lower valve rod body.

Description

Technical Field

[0001] The invention discloses a double water-cooled butterfly valve, which is used for regulating the gas in the clean gas flue and the waste gas flue of a calcium carbide furnace, and relates to the technical field of design and manufacture of a water-cooled butterfly valve. Background Art

[0002] Valves mainly play the role of cutting off and throttling in the flow pipelines of various types of fluids. The opening and closing part of a butterfly valve is a disc-shaped butterfly plate, also known as a flap valve. It is a simple regulating valve that can be used for the on-off control of low-pressure pipeline media. The disc of the butterfly valve is round and rotates around the valve axis to achieve opening and closing. Most existing butterfly valves generally require manual rotation to open or close the butterfly valve during use, and the method is relatively simple;

[0003] The utility model with patent number CN215172315U discloses a manual pneumatic double water-cooled butterfly valve, including a valve body, the inner wall of the valve body is movably connected with a transverse tube through a bearing, the opposite end of the transverse tube is fixedly connected with a valve plate, the left end of the transverse tube is connected with an air motor, the bottom of the left side of the front of the air motor is movably connected with a hand wheel through a rotating rod, the valve plate includes a base layer, and the top of the base layer is fixedly connected with a waterproof layer. The utility model achieves the purpose of good protection effect through the cooperation of the valve body, the transverse tube, the valve plate, the air motor, the hand wheel, the base layer, the waterproof layer, the insulating layer, the high temperature resistant layer, the anti-corrosion layer, the first protective layer and the second protective layer.

[0004] The patent has a high temperature resistant layer fixedly connected to the top, and an anti-corrosion layer fixedly connected to the top of the high temperature resistant layer. The high temperature resistant layer includes a first protective layer and a second protective layer. The heat preservation effect is mainly achieved through the high temperature resistant protective layer, and the valve seat and valve disc are not effectively water-cooled for temperature reduction protection;

[0005] Nowadays, chemical enterprises often have flues for clean gas and waste gas. Usually, the highest temperature in this location can reach 1200℃, which is an ultra-high temperature environment. Metal valves work under 1200℃ working conditions. Ordinary stainless steel and carbon steel materials are not feasible for long-term work under such high temperature conditions. The price of aviation-grade materials is too expensive. The materials will be severely deformed when working at a temperature of 1200℃, which directly causes the valves to not work properly and seriously affects production. Summary of the invention

[0006] Based on the above problems, the purpose of the utility model is to provide a double water-cooled butterfly valve in which a water-cooling channel can be set in the valve seat and the valve disc. The utility model includes a valve seat, a valve disc and a valve stem:

[0007] The valve seat is a double-layer structure with a hollow channel in the middle for cooling water to pass through. A valve seat water inlet and a valve seat water outlet are provided on the valve seat 8;

[0008] The valve seat water inlet and the valve seat water outlet are respectively arranged on both sides of the center line of the valve seat mounting valve disc;

[0009] The valve flap is a double-layer structure, including a valve flap, an upper valve flap connecting groove, and a lower valve flap connecting groove;

[0010] There are multiple reinforcing ribs inside the valve disc, all of which are staggered, and one end of each reinforcing rib is not sealed to allow cooling water to bypass the valve disc;

[0011] The valve stem comprises an upper valve stem and a lower valve stem, both of which are double-layered, a water outlet pipe is arranged in the upper valve stem, and a water inlet pipe is arranged in the lower valve stem;

[0012] An upper valve stem connector and a lower valve stem connector are provided at one end of the upper valve stem and the lower valve stem connected to the valve disc;

[0013] The upper valve stem is sealedly connected to the upper valve disc connecting groove at the upper end of the valve disc through the upper valve stem connecting head, and the lower valve stem is sealedly connected to the lower valve disc connecting groove at the lower end of the valve disc through the lower valve stem connecting head.

[0014] The beneficial effects of the utility model are as follows:

[0015] 1. The utility model can achieve an effective cooling effect by circulating water continuously in the flow channels provided in the valve seat, valve disc and valve stem, so that the metal material does not deform in the high-temperature medium, thereby increasing the service life of the valve.

[0016] 2. The staggered reinforcement in the valve disc can not only enhance the compressive strength of the valve disc, but also guide the incoming water to evenly cool the valve disc, so that the valve disc will not deform at high temperature.

[0017] 3. The valve stem is set to double layers, which can not only ensure water cooling, but also ensure the strength of the valve stem and ensure use in the set environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a side sectional structural schematic diagram of the utility model;

[0019] Figure 2 This is a schematic diagram of the front installation structure of the utility model;

[0020] Figure 3 for Figure 1 The side structure diagram of the figure numbers 2 and 4;

[0021] Figure 4 for Figure 1 The front structure diagram of the figure numbers 2 and 4;

[0022] Figure 5 for Figure 1 Schematic diagram of the internal structure of the upper and lower valve stems and the valve disc 4;

[0023] Figure 6 for Figure 1 The three-dimensional structure diagram of the Chinese drawing number 4;

[0024] Figure 7 for Figure 5 An enlarged view of the structure of Figure No. 15.

[0025] In the figure, the reference numerals are:

[0026] Fixed box-1; valve body-2; valve seat water inlet-3; valve disc-4; lower fixed box-5; lower valve stem-6; valve seat water outlet-7; valve seat-8; upper valve stem waterway-9; upper valve stem water outlet-10; guide rotating handle-11; upper valve stem connector-12; upper valve disc connecting groove-13; valve disc reinforcing rib-14; upper valve stem-15; lower valve stem-16; lower valve stem connector-17; lower valve disc connecting groove-18. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments.

[0028] Therefore, based on the embodiments of the present utility model, all other embodiments obtained by ordinary technicians in this field without making any creative work shall fall within the scope of protection of the present utility model.

[0029] Embodiment 1, the installation structure of the utility model.

[0030] A double water-cooled butterfly valve, comprising a valve seat 8, a valve disc 4, and a valve stem:

[0031] The valve seat 8 is a double-layer structure, with a hollow channel in the middle for cooling water to pass through. A valve seat water inlet 3 and a valve seat water outlet 7 are provided on the valve seat 8. The valve seat water inlet 3 and the valve seat water outlet 7 are respectively arranged on both sides of the center line of the valve seat mounting valve disc 4, for passing cooling water to cool the valve seat 8;

[0032] The valve flap 4 is a double-layer structure. In order to strengthen the strength of the valve flap 4 and evenly cool the cooling water, multiple reinforcing ribs 14 are arranged inside the valve flap 4. All reinforcing ribs 14 are staggered. One end of each reinforcing rib 14 is not sealed to keep the cooling water bypassing and flowing in the valve flap 4 and fully cool the valve flap 4. The arranged reinforcing ribs can also play a role of pressure resistance during use; the arranged water channel can make the cooling water circulate in the valve flap, which can effectively play a cooling effect;

[0033] The valve stem includes an upper valve stem 15 and a lower valve stem 16. Both the upper valve stem 15 and the lower valve stem 16 are double-layered. An outlet pipe 9 is provided in the upper valve stem 15, and an inlet pipe 6 is provided in the lower valve stem 16. Circulating water is input from the inlet pipe 6 in the lower valve stem 16, passes through a bypass waterway provided in the inner layer of the valve disc 4, and is discharged from the outlet pipe 9 in the middle of the upper valve stem 15 through the water outlet 10. An upper valve stem connector 12 and a lower valve stem connector 17 are provided at one end of the upper valve stem 15 and the lower valve stem 16 connected to the valve disc 4, so as to facilitate the connection with the upper and lower valve stems 15 and 16.

[0034] The upper and lower ends of the valve disc 4 are provided with valve disc connection grooves 13 of upper and lower valve stems 15 and 16, the upper valve stem 15 is sealedly connected to the valve disc connection groove 13 at the upper end of the valve disc 4 through the upper valve stem connector 12, and the lower valve stem 16 is sealedly connected to the valve disc connection groove 18 at the lower end of the valve disc 4 through the lower valve stem connector 17;

[0035] Embodiment 2: The design concept of the present utility model.

[0036] In the prior art, in order to cool down the valve, the method of using circulating water to cool down the outside of the shell is basically adopted. This method has limited cooling effect on the valve core, especially at a high temperature of more than 1000 degrees, and it is difficult to fully take into account the cooling of the internal parts of the valve;

[0037] The utility model designs the valve seat, valve stem and valve plate to be hollow. After assembling the valve plate and valve stem through special tooling, the valve stem and valve plate are fixed, which can effectively ensure the concentricity of the valve as a whole and reduce the phenomenon of non-sticking. The cooling water enters the lower end of the valve stem, reaches the valve plate cavity, and then flows out through the upper end of the valve stem, which can effectively play a role in cooling, effectively reducing the thermal deformation of the valve stem and the sealing surface, so that the valve does not stick and leaks to the bottom;

[0038] The butterfly valve structure of the utility model adopts a centerline butterfly valve. The sealing structure of the butterfly valve adopts an X-shaped seal, and the sealing surface fits better. Tests have proved that the sealing effect is better than the 360° rotating structure. The outer diameter of the valve disc does not have any contact with the valve body and the sealing surface during the entire operation of full opening or full closing, and can maintain a sufficient distance to prevent the valve from getting stuck.

[0039] The valve stem of the utility model adopts a fixed box structure (stuffing box) that passes through the upper and lower ends. No metal guide ring is set inside the box, because the metal guide ring is easy to deform under high temperature conditions and jam the valve stem. In addition, the guide rotating handle of the utility model is set outside the valve body to ensure that there is no jamming caused by deformation due to the guide.

[0040] The upper end of the valve stem of the utility model is provided with a thread, and two bearings are arranged on the upper bracket for adjusting the upper and lower positions of the valve plate to achieve a sealing effect.

[0041] The upper fixing box of the utility model is appropriately longer than the lower fixing box, so as to maintain an appropriate distance from the pipeline and prevent the cylinder from damaging the sealing element in a long-term high-temperature environment.

[0042] Embodiment 3: Application environment and parameters of the utility model.

[0043] The utility model water-cooled butterfly valve is used to cut off and regulate the high-temperature flue self-adjusting butterfly valve, the adjustment range is 0-360 degrees, the flue is vertical to the ground, the medium is the high-temperature flue gas of the calcium carbide furnace, the dust content of the flue gas is relatively high, and its main components are

[0044]

[0045] Flue gas maximum temperature 1200℃, flow rate 3000-7000M 3 / h, pressure ±5KPa.

[0046] A circulating water cooling water is arranged between the valve disc and the valve stem cavity, and a cooling water is arranged between the valve body. The cooling water pressure is 0.3MPa softened water, the inlet water temperature is ≤35℃, and the outlet temperature is 60℃-80℃.

[0047] The utility model water-cooled butterfly valve has a nominal diameter of DN600mm and is flange-connected. It can be driven by a pneumatic actuator or a manual actuator. It can be adjusted arbitrarily within 0-360 degrees. The actuator is unidirectional, one for fault open and the other for fault close.

[0048] Further, Figure 7 What is shown is an enlarged structural schematic diagram of the valve stem of the utility model. The upper and lower valve stems 15 and 16 in the specification have basically the same structure.

[0049] Furthermore, the utility model does not involve the switching mechanism and handwheel of the valve disc. A pneumatic switch or a manual switch or both pneumatic and manual switches may be used. Regardless of the switching method used, it is prior art. Ordinary technicians in this field can easily find a way to switch the valve, and can also easily match the desired switching method with the utility model. Therefore, it will not be elaborated here.

Claims

1. A double water-cooled butterfly valve, characterized in that: It includes valve seat (8), valve disc (4) and valve stem: The valve seat (8) is a double-layer structure with a hollow channel in the middle for cooling water to pass through. The valve seat (8) is provided with a valve seat water inlet (3) and a valve seat water outlet (7); The valve seat water inlet (3) and the valve seat water outlet (7) are respectively arranged on both sides of the center line of the valve seat mounting valve disc (4); The valve flap (4) is a double-layer structure, comprising a valve flap (4), an upper valve flap connecting groove (13), and a lower valve flap connecting groove (18); A plurality of reinforcing ribs (14) are arranged inside the valve disc (4), all the reinforcing ribs (14) are arranged in a staggered manner, and one end of each reinforcing rib (14) is not sealed, so as to allow cooling water to bypass and flow through the valve disc (4); The valve stem comprises an upper valve stem (15) and a lower valve stem (16); the upper valve stem (15) and the lower valve stem (16) are both double-layered; a water outlet pipe (9) is arranged in the upper valve stem (15), and a water inlet pipe (6) is arranged in the lower valve stem (16).

2. A double water-cooled butterfly valve according to claim 1, characterized in that: An upper valve stem connector (12) and a lower valve stem connector (17) are provided at one end of the upper valve stem (15) and the lower valve stem (16) connected to the valve flap (4); The upper valve stem (15) is sealedly connected to an upper valve disc connecting groove (13) at the upper end of the valve disc (4) via an upper valve stem connecting head (12), and the lower valve stem (16) is sealedly connected to a lower valve disc connecting groove (18) at the lower end of the valve disc (4) via a lower valve stem connecting head (17).

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