阅读说明：本技术 半球阀密封机构及带密封机构的半球阀 (Hemisphere valve sealing mechanism and hemisphere valve with sealing mechanism ) 是由 张晓宁 丛华成 赵玉伟 张文平 李鸣 刘晨晨 于 2021-02-09 设计创作，主要内容包括：本发明公开了一种半球阀密封机构及带密封机构的半球阀,半球阀密封机构设有密封套,所述密封套为空心的管状结构,所述密封套由同轴设置的左密封套和右密封套一体成型制成,所述左密封套的外径大于右密封套的外径,所述左密封套的右端与右密封套的左端相连接,所述左密封套与右密封套的连接处形成环形水平定位面,所述右密封套的内壁上沿其周向开设有内环形凹槽,外壁上沿其周向开设有至少一个外环形凹槽,本发明具有结构简单、能够有效降低半球阀芯转动局部过盈量大磨损严重的问题、密封效果好等优点。(The invention discloses a hemisphere valve sealing mechanism and a hemisphere valve with the sealing mechanism, wherein the hemisphere valve sealing mechanism is provided with a sealing sleeve, the sealing sleeve is of a hollow tubular structure, the sealing sleeve is formed by integrally forming a left sealing sleeve and a right sealing sleeve which are coaxially arranged, the outer diameter of the left sealing sleeve is larger than that of the right sealing sleeve, the right end of the left sealing sleeve is connected with the left end of the right sealing sleeve, an annular horizontal positioning surface is formed at the joint of the left sealing sleeve and the right sealing sleeve, an inner annular groove is formed in the inner wall of the right sealing sleeve along the circumferential direction of the right sealing sleeve, and at least one outer annular groove is formed in the outer wall of the right sealing sleeve along the circumferential direction of the right sealing sleeve.)

1. A hemisphere valve sealing mechanism which characterized in that: the sealing sleeve is of a hollow tubular structure, the sealing sleeve is formed by integrally forming a left sealing sleeve and a right sealing sleeve which are coaxially arranged, the right end of the left sealing sleeve is connected with the left end of the right sealing sleeve, an inner annular groove is formed in the inner wall of the right sealing sleeve along the circumferential direction of the inner annular groove, and at least one outer annular groove is formed in the outer wall of the right sealing sleeve along the circumferential direction of the outer annular groove.

2. The hemispherical valve sealing mechanism of claim 1, wherein: the outer diameter of the left sealing sleeve is larger than that of the right sealing sleeve, and an annular horizontal positioning surface is formed at the joint of the left sealing sleeve and the right sealing sleeve.

3. A hemispherical valve seal mechanism as claimed in claim 1 or 2, wherein: the inner annular grooves and the outer annular grooves are arranged in a staggered mode.

4. A hemispherical valve seal mechanism as claimed in claim 3, wherein: the inner diameter of the inner annular groove is larger than the inner diameter of the outer annular groove.

5. A hemisphere valve seal mechanism as claimed in claim 4, wherein: the side wall of the inner annular groove is in smooth transition connection with the inner wall of the sealing sleeve through an arc-shaped surface.

6. A hemisphere valve seal mechanism as claimed in claim 5, wherein: the sealing sleeve is made of high-wear-resistance high-elasticity stainless steel.

7. The utility model provides a take sealing mechanism's hemisphere valve, includes valve body, hemisphere case, valve rod, hemisphere case counter roll and transmission, its characterized in that: the valve body sealing structure is characterized by further comprising a compression sleeve and the sealing sleeve as in claim 1 or 2 or 4 or 5 or 6, the sealing sleeve and the compression sleeve are sequentially and coaxially arranged in a flow channel of the valve body, the compression sleeve is of a hollow tubular structure, an external thread is arranged on the outer wall of the compression sleeve, an internal thread matched with the compression sleeve is arranged on the inner wall of the outlet end of the valve body, the compression sleeve is in threaded connection with the valve body, the left sealing sleeve is in sealing fit with the inner wall of the valve body, the right sealing sleeve is in clearance fit with the inner wall of the valve body, the left end of the left sealing sleeve is abutted to the compression sleeve, and the right end of the right sealing.

8. The hemisphere valve with the sealing mechanism according to claim 7, wherein: and unit tightening grooves are formed in the end face, far away from the sealing sleeve, of the compression sleeve in a circumferential array mode.

Technical Field

The invention relates to the technical field of ball valves, in particular to a sealing mechanism of a half ball valve and the half ball valve with the sealing mechanism.

Background

The half ball valve is mainly used for cutting off and distributing the flowing direction of a medium or adjusting the flow of the medium, and is widely applied to the fields of water, steam, sewage, petrochemical industry, natural gas and the like.

A hemisphere valve used in the prior art comprises a valve body, a valve seat, a hemisphere valve core, a valve rod, a hemisphere valve core fulcrum shaft and a transmission device, wherein the valve body is a hollow valve body, a runner and a hemisphere valve core for conducting or blocking the runner are arranged in the valve body, the upper end of the hemisphere valve core is fixedly connected with the valve rod, the lower end of the hemisphere valve core is rotatably connected with the hemisphere valve core fulcrum shaft, the hemisphere valve core fulcrum shaft is fixed on the valve body, a through hole for the valve rod to penetrate out and is in sealing connection with the valve rod is formed in the valve body, one end, far away from the hemisphere valve core, of the valve rod penetrates out of the valve body through the through hole and is connected with the transmission device, a valve seat in sealing fit with the hemisphere valve core is arranged in the runner, the valve seat is a hollow tubular, the valve rod and the hemispherical valve core support shaft are eccentrically arranged, so that the axis of the valve rod (the rotation center of the hemispherical valve core) and the geometric center of the hemispherical valve core deviate by an eccentric distance, the hemispherical valve core can leave the valve seat by rotating a small angle when the valve rod is opened so as to open the flow passage, and the hemispherical valve core is contacted with the valve seat when the valve rod is closed so as to close the flow passage.

The existing structure has the following defects: the sealing is realized through the outer sealing face of hemisphere case and the sealed face of disk seat is inconsistent through prior art, because of the centre of rotation of hemisphere case and the geometric centre of hemisphere case self do not coincide for hemisphere case is at each point inequality its interference magnitude with the disk seat contact surface of rotation in-process, the great place of interference magnitude can at first appear wearing and tearing, along with the increase of use number of times, can lead to sealed face inefficacy, sealed effect is not good, causes the fluid to reveal easily, hemisphere valve life is short.

Disclosure of Invention

The invention aims to solve the defects of the prior art and provides a hemispherical valve sealing mechanism and a hemispherical valve with the same, wherein the hemispherical valve sealing mechanism is simple in structure, can effectively reduce the problems of large local interference and serious abrasion of the rotating hemispherical valve core and has a good sealing effect.

The technical scheme adopted by the invention for solving the technical problems is as follows:

a hemisphere valve sealing mechanism which characterized in that: is provided with a sealing sleeve which is a hollow tubular structure and is integrally formed by a left sealing sleeve and a right sealing sleeve which are coaxially arranged, the right end of the left sealing sleeve is connected with the left end of the right sealing sleeve, an inner annular groove is arranged on the inner wall of the right sealing sleeve along the circumferential direction of the right sealing sleeve, at least one outer annular groove is arranged on the outer wall of the right sealing sleeve along the circumferential direction of the right sealing sleeve, a sealing sleeve is arranged in the valve body and is abutted against the outer sealing surface of the hemispherical valve core to realize sealing, by arranging the inner annular groove and the outer annular groove on the sealing sleeve, the axial and radial elastic deformation can be formed simultaneously on a smaller size when the sealing sleeve is in contact with and stressed by the hemispherical valve core, and the deformation amount can be automatically adjusted, the problem that interference magnitude is inconsistent in the rotating process of a hemispherical valve core formed by the eccentric arrangement of the valve rod of the hemispherical valve is solved, abrasion is effectively reduced, and the sealing effect is good.

The outer diameter of the left sealing sleeve is larger than that of the right sealing sleeve, and an annular horizontal positioning surface is formed at the joint of the left sealing sleeve and the right sealing sleeve, so that the sealing sleeve is fixed in the valve body through the annular horizontal positioning surface.

The inner annular grooves and the outer annular grooves are arranged in a staggered mode, so that relatively large elastic deformation can be formed when the sealing sleeve is in contact with the hemispherical valve core and stressed, and the interference magnitude is guaranteed to be consistent.

The inner diameter of the inner annular groove is larger than that of the outer annular groove, so that a relatively large deformation space is further ensured when the sealing sleeve is in contact with the hemispherical valve core and is stressed.

The side wall of the inner annular groove is in smooth transition connection with the inner wall of the sealing sleeve through the arc-shaped surface, the arc-shaped surface is arranged at the joint of the inner annular groove and the inner wall of the sealing sleeve, and when the hemispherical valve core is in stress conflict with the sealing sleeve, a relatively large deformation space of the sealing sleeve can be ensured, the consistency of interference magnitude is further ensured, and the sealing effect of the sealing sleeve and the hemispherical valve core is good.

The sealing sleeve is made of high-wear-resistance high-elasticity stainless steel, is wear-resistant, elastic and corrosion-resistant, and ensures good sealing performance and long service life of the hemispherical valve after long-term use.

The utility model provides a take sealing mechanism's hemisphere valve, includes valve body, hemisphere case, valve rod, hemisphere case counter roll and transmission, its characterized in that: the valve body is characterized by further comprising a pressing sleeve and the sealing sleeve, the sealing sleeve and the pressing sleeve are sequentially and coaxially arranged in a flow passage of the valve body, the pressing sleeve is of a hollow tubular structure, external threads are arranged on the outer wall of the pressing sleeve, internal threads matched with the pressing sleeve are arranged on the inner wall of the outlet end of the valve body, the pressing sleeve is in threaded connection with the valve body, the left sealing sleeve is in sealing fit with the inner wall of the valve body, the right sealing sleeve is in clearance fit with the inner wall of the valve body, the left end of the left sealing sleeve is abutted against the pressing sleeve, the right end of the right sealing sleeve is in interference fit with the outer sealing surface of the hemispherical valve element, the sealing sleeve is pressed by the pressing sleeve to fix the sealing sleeve, meanwhile, the sealing sleeve and the pressing sleeve are convenient to mount and dismount, the hemispherical valve element is matched with the sealing sleeve to realize communication or, an avoiding space for radial deformation of the sealing sleeve is reserved between the sealing sleeve and the inner wall of the valve body.

The unit tightening grooves are formed in the circumferential array on the end face, away from the sealing sleeve, of the compression sleeve, so that the compression sleeve can be screwed into the valve body conveniently by using a tool to abut against the sealing sleeve, the sealing performance of the sealing sleeve and the hemispherical valve core is guaranteed, and the compression sleeve is convenient to install.

The invention has the beneficial effects that: the valve body is internally provided with a sealing sleeve, the sealing sleeve is abutted against the outer sealing surface of the hemispherical valve core to realize sealing, and the sealing sleeve is provided with an inner annular groove and an outer annular groove, so that the sealing sleeve and the hemispherical valve core can form elastic deformation in a smaller size when being in contact stress, and the deformation amount can be automatically adjusted, so that the problem of inconsistent interference of the hemispherical valve core formed by the eccentric arrangement of the valve rod of the hemispherical valve in the rotating process is solved, the abrasion is effectively reduced, and the sealing effect is good; the sealing sleeve is made of high-wear-resistance high-elasticity stainless steel, is wear-resistant, elastic and corrosion-resistant, so that the sealing performance of the hemisphere valve is good after long-term use, and the service life of the hemisphere valve is long; the compression sleeve is arranged to compress the sealing sleeve to fix the sealing sleeve, the sealing sleeve and the compression sleeve are convenient to mount and dismount, and the hemispherical valve core is matched with the sealing sleeve to realize communication or blocking of a flow passage; the right sealing sleeve is in clearance fit with the inner wall of the valve body, so that an avoiding space for deformation of the sealing sleeve is reserved between the sealing sleeve and the inner wall of the valve body when the hemispherical valve core is in contact stress with the sealing sleeve.

Drawings

Fig. 1 is a side view of the overall structure of the present invention.

Fig. 2 is a sectional view a-a in fig. 1.

Fig. 3 is a sectional view B-B of fig. 1.

Fig. 4 is an enlarged schematic view at C in fig. 3.

Fig. 5 is a schematic view of the structure of the sealing sleeve of the invention.

Reference numerals: the valve comprises a valve body-1, a hemispherical valve core-2, a valve rod-3, a hemispherical valve core fulcrum-4, a sealing sleeve-5, a left sealing sleeve-501, a right sealing sleeve-502, an annular horizontal positioning surface-503, an inner annular groove-504, an arc surface-5041, an outer annular groove-505, a compression sleeve-6 and a unit tightening groove-601.

Detailed Description

The invention is described below with reference to the accompanying drawings and examples.

As shown in the attached drawings, a sealing sleeve 5 is provided, the sealing sleeve 5 is a hollow tubular structure, the sealing sleeve 5 is formed by integrally forming a left sealing sleeve 501 and a right sealing sleeve 502 which are coaxially arranged, the right end of the left sealing sleeve 501 is connected with the left end of the right sealing sleeve 502, an inner annular groove 504 is formed on the inner wall of the right sealing sleeve 502 along the circumferential direction thereof, at least one outer annular groove 505 is formed on the outer wall along the circumferential direction thereof, the sealing sleeve 5 is arranged in a valve body 1, the sealing sleeve 5 is abutted against the outer sealing surface of a hemispherical valve core 2 to realize sealing, the sealing sleeve is provided with the inner annular groove 504 and the outer annular groove 505, so that the sealing sleeve and the hemispherical valve core can form elastic deformation in a smaller size when being subjected to contact force, and the deformation can be automatically adjusted, so as to solve the problem that the excessive quantity of the hemispherical valve core formed by the eccentric arrangement of a valve rod of the hemispherical valve, effectively reduces abrasion and has good sealing effect.

The outer diameter of the left sealing sleeve 501 is larger than that of the right sealing sleeve 502, and an annular horizontal positioning surface 503 is formed at the joint of the left sealing sleeve 501 and the right sealing sleeve 502, so that the sealing sleeves are fixed in the valve body through the annular horizontal positioning surface.

The inner annular grooves 504 and the outer annular grooves 505 are arranged in a staggered manner, so that relatively large elastic deformation can be formed when the sealing sleeve 5 is in contact with and stressed by the hemispherical valve core, and the interference is consistent.

In this embodiment, two outer annular grooves 505 are axially formed in the outer wall of the right sealing sleeve 502, the inner annular groove 504 is formed between the two outer annular grooves 505, and the two outer annular grooves 505 further ensure that the sealing sleeve can form relatively large elastic deformation when being in contact with and stressed by the hemispherical valve core.

The inner diameter of the inner annular groove is larger than that of the outer annular groove, as shown in fig. 5, L1 is the inner diameter of the inner annular groove, L2 is the inner diameter of the outer annular groove, and L1 is larger than L2, so that a relatively large deformation space is further ensured when the sealing sleeve is in contact with the hemispherical valve core under stress.

The side wall of the inner annular groove 504 is in smooth transition connection with the inner wall of the sealing sleeve 5 through an arc surface 5041, the arc surface 5041 is arranged at the joint of the inner annular groove 504 and the inner wall of the sealing sleeve 5, and when the hemispherical valve core 2 is abutted against the sealing sleeve 5, the sealing sleeve can have a relatively large deformation space, so that the interference magnitude consistency of each contact point is further ensured, and the sealing effect of the sealing sleeve and the hemispherical valve core is good.

The sealing sleeve 5 is made of high-wear-resistance high-elasticity stainless steel, and the sealing sleeve 5 is made of high-wear-resistance high-elasticity stainless steel, is wear-resistant, elastic and corrosion-resistant, so that the sealing performance of the hemisphere valve is good after long-term use, and the service life of the hemisphere valve is long.

The inner diameter of the left sealing sleeve 501 is equal to that of the right sealing sleeve 502, so that fluid can smoothly flow out after the flow channel is opened.

A hemisphere valve with a sealing mechanism comprises a valve body 1, a hemisphere valve core 2, a valve rod 3, a hemisphere valve core fulcrum shaft 4 and a transmission device, wherein the valve body 1 is a hollow valve body, a flow passage and a hemisphere valve core 2 for conducting or blocking the flow passage are arranged in the valve body 1, the upper end of the hemisphere valve core 2 is fixedly connected with the valve rod 3, the lower end of the hemisphere valve core fulcrum shaft is rotatably connected with the hemisphere valve core fulcrum shaft 4, the hemisphere valve core fulcrum shaft 4 is fixed at the lower end of the valve body 1, a through hole for the valve rod 3 to penetrate out and to be connected with the valve rod 3 in a sealing manner is formed in the upper end of the valve body 1, one end, far away from the hemisphere valve core 2, of the valve rod 3 penetrates out of the valve body 1 through the through hole to be connected with the transmission device, a hemisphere surface of the hemisphere valve core, the valve rod axis deviates from the geometric center of the hemispherical valve core by an eccentricity, the hemispherical valve further comprises a compression sleeve 6 and a sealing sleeve 5 in sealing fit with the hemispherical valve core 2, the sealing sleeve 5 is of a hollow tubular structure, the sealing sleeve 5 is composed of a left sealing sleeve 501 and a right sealing sleeve 502 which are coaxially arranged, the right end of the left sealing sleeve 501 is connected with the left end of the right sealing sleeve 502, an inner annular groove 504 is formed in the inner wall of the right sealing sleeve 502 along the circumferential direction of the inner sealing sleeve, and at least one outer annular groove 505 is formed in the outer wall of the right sealing sleeve 502 along the circumferential direction of the.

The outer diameter of the left sealing sleeve 501 is larger than that of the right sealing sleeve 502, and an annular horizontal positioning surface 503 is formed at the joint of the left sealing sleeve 501 and the right sealing sleeve 502.

The inner annular grooves 504 and the outer annular grooves 505 are arranged in a staggered manner, so that relatively large elastic deformation can be formed when the sealing sleeve 5 is in contact with and stressed by the hemispherical valve core, and the interference is consistent.

In this embodiment, two outer annular grooves 505 are axially formed in the outer wall of the right sealing sleeve 502, the inner annular groove 504 is formed between the two outer annular grooves 505, and the two outer annular grooves 505 further ensure that the sealing sleeve can form relatively large elastic deformation when being in contact with and stressed by the hemispherical valve core.

The inner diameter of the inner annular groove is larger than that of the outer annular groove, as shown in fig. 5, L1 is the inner diameter of the inner annular groove, L2 is the inner diameter of the outer annular groove, and L1 is larger than L2, so that a relatively large deformation space is further ensured when the sealing sleeve is in contact with the hemispherical valve core under stress.

The side wall of the inner annular groove 504 is in smooth transition connection with the inner wall of the sealing sleeve 5 through an arc surface 5041, the arc surface 5041 is arranged at the joint of the inner annular groove 504 and the inner wall of the sealing sleeve 5, and when the hemispherical valve core 2 is abutted against the sealing sleeve 5, the sealing sleeve can have a relatively large deformation space, so that the interference magnitude consistency of each contact point is further ensured, and the sealing effect of the sealing sleeve and the hemispherical valve core is good.

The sealing sleeve 5 is made of high-wear-resistance high-elasticity stainless steel, and the sealing sleeve 5 is made of high-wear-resistance high-elasticity stainless steel, is wear-resistant, elastic and corrosion-resistant, so that the sealing performance of the hemisphere valve is good after long-term use, and the service life of the hemisphere valve is long.

The inner diameter of the left sealing sleeve 501 is equal to that of the right sealing sleeve 502, so that fluid can smoothly flow out after the flow channel is opened.

The sealing sleeve 5 and the pressing sleeve 6 are coaxially arranged in a flow passage of the valve body 1 in sequence and at an outlet end of the valve body, the pressing sleeve 6 is of a hollow tubular structure, an external thread is arranged on the outer wall of the pressing sleeve 6, an internal thread matched with the pressing sleeve 6 is arranged on the inner wall of the outlet end of the valve body 1, the pressing sleeve 6 is in threaded connection with the valve body 1, the shape of the inner wall of the valve body is matched with that of the outer wall of the sealing sleeve, in the embodiment, the sealing sleeve 5 is fixed in the valve body 1 through an annular horizontal positioning surface 503, the left sealing sleeve 501 is in sealing fit with the inner wall of the valve body, the right sealing sleeve 502 is in clearance fit with the inner wall of the valve body, the left end of the left sealing sleeve is abutted against the pressing sleeve 6, the right end of the right sealing sleeve is in interference fit with the outer sealing surface of the hemispherical, the hemisphere case 2 and the seal cover 5 cooperate to realize the communication of runner or block, and when transmission drove the valve rod and rotate and make hemisphere case and seal cover conflict, in order to block the valve body runner, when transmission drove the valve rod and rotate and make hemisphere case and seal cover break away from, the runner intercommunication, right seal cover 502 and valve body inner wall clearance fit, so that when hemisphere case and seal cover contact atress, leave the dodge space of seal cover deformation between seal cover and the valve body inner wall.

The circumference array is equipped with unit and screws up groove 601 on the terminal surface of pressing sleeve 6 one side far away from seal cover 5, and the use of convenience instrument will press sleeve 6 and screw in valve body 1 with seal cover 5 support tightly, guarantees the leakproofness of seal cover 5 and hemisphere case 2, presses sleeve 6 simple to operate.

The inner diameter of the pressing sleeve 6 is equal to that of the sealing sleeve 5, so that fluid can smoothly flow out after the flow channels are communicated.

When the valve is installed, the sealing sleeve 5 is fixed in a flow passage at the outlet end of the valve body 1 through the annular horizontal positioning surface 503, the pressing sleeve 6 extends into the valve body 1 and is in threaded connection with the valve body 1, and the pressing sleeve 6 presses the sealing sleeve 5 to ensure that the sealing sleeve 5 cannot move.

When the invention is used, the outer sealing surface of the hemispherical valve core 2 is in sealing fit with the sealing sleeve 5 to close the flow passage, when the flow passage needs to be closed, the transmission device drives the valve rod 3 to rotate, the valve rod 3 rotates to drive the hemispherical valve core 2 to rotate so that the outer sealing surface of the hemispherical valve core 2 is contacted with the sealing sleeve 5, because the sealing sleeve is made of high-wear-resistance high-elasticity stainless steel, the sealing sleeve 5 is extruded by the hemispherical valve core 2, the gap of the inner annular groove and the gap of the outer annular groove are gradually reduced, the sealing sleeve is deformed, the sealing surface of the sealing sleeve is tightly attached with the outer sealing surface of the hemispherical valve core, the inner hole of the sealing sleeve is sealed to block the flow passage, and simultaneously the outer wall of the right sealing sleeve gradually extrudes an avoiding space between the outer wall of the right sealing sleeve and the inner wall of the valve body, the service life is prolonged; when the runner needs to be opened, the transmission device drives the valve rod 3 to rotate, and because the valve rod 3 is eccentrically arranged, the valve rod 3 only needs to drive the hemispherical valve core 2 to rotate by a small angle, so that the outer sealing surface of the hemispherical valve core can be separated from the sealing sleeve, and the deformation of the sealing sleeve is recovered; when the sealing sleeve 5 needs to be replaced, the pressing sleeve 6 is screwed out, so that the sealing sleeve 5 can be taken out, and the maintenance is convenient.