Scour-reducing ball valve

Abstract

The utility model relates to the field of fluid valves, in particular to a scouring reduction ball valve which comprises a main valve body and an auxiliary valve body, a valve rod penetrates through the main valve body, the bottom end of the valve rod is connected with a ball body, and a sealing valve seat and a supporting valve seat are arranged on the two sides of the ball body. The ball body is provided with a channel, one side of the sealing valve seat is provided with an outer opening used in cooperation with the channel, the sealing valve seat and the auxiliary valve body are of an integrated structure, the sealing valve seat is provided with a taper hole, the taper hole is communicated with the channel of the sealing valve seat, a sealing face is arranged outside the taper hole, and the spherical surface of the ball body and the sealing face of the taper hole are in spherical surface bridging. A groove is formed in a flow channel of the supporting valve seat, and the supporting valve seat is connected with the main valve body through a disc spring. According to the ball valve, scouring of fluid to the ball opening and scouring of the fluid to the ball body channel can be reduced, the sealing face of the sealing valve seat makes full contact with the spherical face of the ball body all the time, scouring of the fluid to the sealing face of the sealing valve seat in the fluid opening state and the fluid closing state is completely avoided, and use stability is good.

Description

TECHNICAL FIELD

[0001] The utility model relates to fluid valve field, concretely is a kind of ball valve that reduces scouring. BACKGROUND

[0002] The existing ball valve generally includes valve body, valve stem, ball, sealing valve seat, support valve seat and disc spring, the valve stem passes through the valve body, thereby mechanically combined with the ball, the sealing element is the ball and the valve seat, the ball and the valve seat are spherical surface cooperation, the elastic force of disc spring makes the ball and the valve seat close, the ball is the pivot of valve stem, can be rotated 90 degrees in the valve body, to open and close the valve body (piping) passage, reach the function of opening and cutting off passage medium.

[0003] The ball valve used at present is easy to be abraded after long-term use or be eroded under high temperature and high pressure environment, under the condition of small opening degree of valve opening and closing, fluid produces scouring to ball mouth and ball flow channel, and during opening and closing process, part of sealing surface of valve seat is exposed in fluid, fluid produces direct scouring to exposed valve seat sealing surface, further leak occurs, so that the stability of the ball valve in actual use is poor. SUMMARY

[0004] To achieve the above object, the utility model aims at providing a kind of ball valve that reduces scouring, which can solve the problems in the background art. The utility model provides the following technical solutions:

[0005] A kind of ball valve that reduces scouring, including main valve body and auxiliary valve body, the valve stem passes through main valve body, the bottom end of the valve stem is connected with ball, the two sides of the ball are provided with sealing valve seat and support valve seat, channel is provided on the ball, and the outer opening used in cooperation with the channel is provided on one side of the sealing valve seat, the sealing valve seat is integrated with auxiliary valve body, taper hole is provided on the sealing valve seat, the flow channel of sealing valve seat is communicated with taper hole, sealing surface is provided outside taper hole, the sealing surface of taper hole and the sealing surface of sealing valve seat are spherical surface healing, recess is provided on the flow channel of support valve seat, support valve seat and main valve body are connected by disc spring, the disc spring makes the ball always close to sealing valve seat and support valve seat respectively.

[0006] As a further scheme of the utility model: the end of valve stem away from main valve body is installed with support, support is connected with main valve body, connection firmness is good, further enhance the overall impact resistance.

[0007] As a further scheme of the utility model: the end of valve stem away from main valve body is installed with connecting plate, the lower end of connecting plate is fixedly connected with support, the connection firmness of valve stem is increased, and the whole product can work stably.

[0008] As a further scheme of the utility model: the main valve body and the auxiliary valve body are made of stainless steel material, stable in use, raw material is easy to process, especially suitable for the conveying scene of corrosive medium and high temperature medium.

[0009] As a further scheme of the utility model: the main valve body and the auxiliary valve body are made of cast iron material, raw material is easy to obtain, low in cost and convenient to process.

[0010] Compared with the prior art, the utility model has the advantages of:

[0011] The product can realize that when the fluid is in a small opening state, the fluid supporting the valve seat reduces the flow rate after passing through the flow passage opening formed by the supporting valve seat and the ball body, the fluid can reduce the scouring of the ball opening and the scouring of the ball body channel, in addition, when the fluid passes through the channel of the ball body and passes through the flow passage opening of the ball body and the sealing valve seat, the flow rate is further reduced, and the scouring of the ball opening and the sealing valve seat by the fluid is reduced; the sealing surface of the sealing valve seat is always in full contact with the spherical surface of the ball body during the process of opening and closing the fluid, which completely avoids the scouring of the sealing surface of the sealing valve seat by the fluid during the process of opening and closing the fluid, and has good stability. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is a sectional view of the ball valve of the utility model embodiment.

[0013] Figure 2 It is a schematic view of the A-A direction of the ball valve in a small opening fluid state in the utility model embodiment.

[0014] Figure 3 It is a schematic view of the A-A direction of the ball valve in a small opening fluid state in the utility model embodiment.

[0015] Figure 4 It is a schematic view of the A-A direction of the ball valve in a small opening fluid state in the utility model embodiment.

[0016] Figure 5 It is a schematic view of the A-A direction of the ball valve in a small opening fluid state in the utility model embodiment.

[0017] In the figure: 1-auxiliary valve body;2-sealing valve seat;3-ball body;4-valve stem;5-support;6-connection plate;7-supporting valve seat;8-disc spring;9-main valve body;21-first fluid;22-second fluid;23-third fluid;a-groove;b-outer opening;c-tapered hole. DETAILED DESCRIPTION

[0018] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of the present application.

[0019] The specific implementation of the present application will be described in detail below in combination with specific embodiments.

[0020] Please refer to Figure 1 The utility model discloses a kind of ball valves of reducing scouring, including main valve body 9 and auxiliary valve body 1, the valve stem 4 passes through main valve body 9, the bottom end of the valve stem 4 is connected with ball 3, the two sides of ball 3 are provided with sealing valve seat 2 and support valve seat 7, channel is equipped on ball 3 and the outer opening b of sealing valve seat 2 side is equipped with cooperation channel, sealing valve seat 2 is integrated with auxiliary valve body 1, taper hole c is equipped on sealing valve seat 2, taper hole c is communicated with the flow channel of sealing valve seat 2, taper hole c is equipped with sealing surface outside, the sealing surface of taper hole c and the sealing surface of ball 3 are spherical face, the flow channel of support valve seat 7 is equipped with groove a, support valve seat 7 and main valve body 9 are connected by disc spring 8, and the disc spring 8 makes ball 3 respectively with sealing valve seat 2 and support valve seat 7 always keep close.

[0021] Gas additional catalyst working condition in petrochemical field, ball valve is in switching process, all open fluid state, cut-off fluid state, small opening degree fluid state and full-closed fluid state are passed through.

[0022] Please refer to Figure 1 When all open fluid state, first fluid 21, second fluid 22 and third fluid 23 enter main valve body 9 and pass through disc spring 8, support valve seat 7, ball 3 and sealing valve seat 2 respectively, and finally flow out from the channel of auxiliary valve body 1. Please refer to Figure 2 When fluid passes through support valve seat 7, first fluid 21 and second fluid 22 directly and smoothly pass through, and third fluid 23 first enters the bottom of groove a, and then flows out from groove a again;When fluid passes through the channel of ball 3, first fluid 21 and second fluid 22 directly and smoothly pass through, and third fluid 23 flows out through the outer opening b of channel;When passing through sealing valve seat 2, first fluid 21 and third fluid 23 are first flowed into and flowed out along the gradient direction of taper hole c, and second fluid 22 directly and smoothly passes through;Ball 3 and sealing valve seat 2 maintain complete sealing surface, and the sealing surface of sealing valve seat 2 is protected and does not bear the direct scouring of fluid medium.

[0023] Please refer to Figure 3In the small opening fluid state, the channel of the ball 3 and the flow channel of the supporting valve seat 7 form a small flow channel opening, the first fluid 21 and the second fluid 22 are diverted downwards to enter the flow channel opening, and the third fluid 23 enters the bottom of the groove a downwards and then flows out of the groove a upwards, the third fluid 23 flowing out of the groove a upwards directly collides with the first fluid 21 and the second fluid 22 flowing downwards, so that the flow rate of the fluid is reduced, the scouring of the fluid on the ball opening of the ball 3 and the channel of the ball 3 is reduced, and the scouring of the fluid on the flow channel of the supporting valve seat 2 is reduced; the first fluid 21 flows out of the taper hole c of the sealing valve seat 2, and the third fluid 23 flows out of the outer opening b of the ball 3, and since the outer opening b of the ball 3 and the taper hole c of the sealing valve seat 2 form a more open flow channel opening, the fluid flowing through the flow channel opening will be slowed down again, so that the scouring of the fluid on the ball opening of the ball 3 and the flow channel of the sealing valve seat 2 is greatly reduced; since the sealing surface of the sealing valve seat 2 is outside the taper hole c, the ball 3 and the sealing valve seat 2 maintain the complete abutting sealing surface, and the sealing surface of the sealing valve seat 2 is protected and does not bear the direct scouring of the fluid medium.

[0024] Referring to Figure 4 In the cut-off fluid state, the ball 3 and the supporting valve seat 7 form a flow channel opening closing state, and the first fluid 21, the second fluid 22 and the third fluid 23 stay in the flow channel of the supporting valve seat 7; the ball 3 and the sealing valve seat 2 continue to maintain the complete abutting sealing surface, and the sealing surface of the sealing valve seat 2 is protected and does not bear the direct scouring of the fluid medium.

[0025] Referring to Figure 5 In the full-closing fluid state, the first fluid 21, the second fluid 22 and the third fluid 23 still stay in the flow channel of the supporting valve seat 7; the ball 3 and the sealing valve seat 2 continue to maintain the complete abutting sealing surface, and the sealing surface of the sealing valve seat 2 is protected and does not bear the direct scouring of the fluid medium.

[0026] In an embodiment of the utility model, the valve rod 4 is provided with a support 5 at one end away from the main valve body 9, the support 5 is connected with the main valve body 9, the connection is firm, and the overall impact resistance is further enhanced.

[0027] In an embodiment of the utility model, the valve rod 4 is provided with a connecting plate 6 at one end away from the main valve body 9, the lower end of the connecting plate 6 is fixedly connected with the support 5, the connection firmness of the valve rod 4 is increased, and the whole product can work stably.

[0028] In an embodiment of the utility model, the main valve body 9 and the auxiliary valve body 1 are both made of stainless steel material, are stable in use, are easy to process, and are especially suitable for conveying scenes of corrosive medium and high-temperature medium.

[0029] In one embodiment of the utility model, main valve body 9 and vice valve body 1 all adopt cast iron material to make, raw material is easy to get, and cost is low, and it is convenient to process, is applicable to the work scene of not high conveying requirement.

[0030] It should be noted that, in the utility model, unless there is definite stipulation and limitation, the terms such as " fixed " " set setting " and so on should be understood broadly, for example, can be welded connection, can also be bolted connection, or integrated;Can be mechanical connection, can also be electrical connection;It can be directly connected, can also be indirectly connected through intermediate medium, can be the communication or mutual action relationship of two elements inside two elements, unless there is definite limitation. For ordinary skilled person in the art, the specific meaning of the above-mentioned terms in the utility model can be understood according to specific circumstances.

[0031] In addition, it should be understood that, although the present specification is described according to embodiments, not every embodiment only contains an independent technical scheme, and the description mode of the specification is only for clarity, and the skilled person in the art should take the specification as a whole, and the technical scheme in each embodiment can also be properly combined to form other embodiments that the skilled person in the art can understand.

Claims

1. A reduced-erosion ball valve comprising a main valve body, a valve stem and a sub valve body, the valve stem passing through the main valve body, a ball body being connected to a bottom end of the valve stem, characterized in that, Two sides of the ball are provided with a sealing valve seat and a supporting valve seat, the ball is provided with a channel and one side of the ball is provided with an outer opening matched with the channel, the sealing valve seat is integrated with the auxiliary valve body, a tapered hole is arranged on the sealing valve seat, the tapered hole is communicated with a flow channel of the sealing valve seat, an outer sealing surface is arranged on the tapered hole, a spherical surface of the ball and the sealing surface of the tapered hole are matched, a groove is arranged on the flow channel of the supporting valve seat, and the supporting valve seat and the main valve body are connected through a disc spring.

2. The reduced-erosion ball valve of claim 1, wherein, The valve rod is provided with a support at an end away from the main valve body.

3. The reduced-erosion ball valve of claim 2, wherein, The valve rod is provided with a connecting plate at an end away from the main valve body, and the lower end of the connecting plate is fixedly connected with the support.

4. The reduced-erosion ball valve of claim 1, wherein, The main valve body and the auxiliary valve body are made of stainless steel.

5. The reduced-erosion ball valve of claim 1, wherein, The main valve body and the auxiliary valve body are made of cast iron.

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