CN214197357U - Two-way two-stage metal hard seal floating ball valve - Google Patents

Two-way two-stage metal hard seal floating ball valve Download PDF

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Publication number
CN214197357U
CN214197357U CN202023056361.8U CN202023056361U CN214197357U CN 214197357 U CN214197357 U CN 214197357U CN 202023056361 U CN202023056361 U CN 202023056361U CN 214197357 U CN214197357 U CN 214197357U
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valve seat
sealing
valve
valve body
supporting
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CN202023056361.8U
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陈曙光
邓晓斌
陈安兴
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Shanghai Kefa Flow Control Technology Co ltd
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Shanghai Kefa Flow Control Technology Co ltd
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Abstract

A bidirectional two-stage metal hard seal floating ball valve relates to the technical field of ball valves; the valve comprises a valve body, a sealing valve seat gasket, a ball body, a valve rod, a filler pressing sleeve, a valve body bracket, a filler screw, a valve body screw supporting valve seat, a supporting sleeve, a disc spring, a thrust snap ring, a front-end anti-extrusion ring, a supporting valve seat sealing ring and a rear-end anti-extrusion ring; the valve rod penetrates through the valve body bracket, the packing pressing sleeve, the packing, the valve body and the ball body to be mechanically combined, the ball body is matched with the sealing valve seat and the supporting valve seat, and a disc spring is arranged between the supporting valve seat and the valve body; the front end anti-extrusion ring, the supporting valve seat sealing ring and the rear end anti-extrusion ring are sequentially arranged at one end of the supporting sleeve close to the sealing valve seat. The utility model has the performance of sealing medium flow direction forward and medium flow direction reverse simultaneously; the design of bidirectional sealing can be applied to the harsh working condition with positive and negative pressure difference; the design of the double-stage seal has more reliable sealing performance so as to adapt to the working condition requiring tight sealing.

Description

Two-way two-stage metal hard seal floating ball valve
Technical Field
The utility model relates to a ball valve technical field, concretely relates to two-way doublestage metal ball valve that floats sealed firmly.
Background
The conventional metal hard-seal floating seal ball valve, as shown in fig. 2, generally comprises a valve body 1, a seal valve seat 2, a ball 4, a valve rod 5, a packing 6, a packing pressing sleeve 7, a valve body bracket 8, a packing screw 9, a valve body screw 10, a support valve seat 11, a support sleeve 12, a belleville spring 13 and a thrust snap ring 14. The sealing elements of the ball-shaped sealing device are a ball 4, a sealing valve seat 2 and a supporting valve seat 11, the ball 4 is matched with the sealing valve seat 2 and the supporting valve seat 11 in a ball-shaped surface mode, and the ball 4 is tightly attached to the sealing valve seat 2 and the supporting valve seat 11 through the elasticity of a disk spring 13. The ball 4 can rotate 90 degrees in the valve body 1 by taking the valve rod 5 as a rotating shaft so as to open and close a pipeline channel of the valve body, thereby achieving the function of opening and cutting off a channel medium. The sealing valve seat 2 of the conventional metal hard-sealing floating sealing ball valve is tightly attached to the valve body 1 to form a sealing valve seat-valve body sealing pair. The sealing surface of the sealing valve seat 2 is tightly attached to the ball 4 to form a sealing valve seat-ball sealing pair. The sealing valve seat-valve body sealing pair and the sealing valve seat-ball body sealing pair jointly form the sealing factor of the conventional metal hard-sealing floating sealing ball valve. If any one of the sealing valve seat-valve body sealing pair and the sealing valve seat-ball body sealing pair of the conventional metal hard-sealing floating sealing ball valve leaks, the valve leaks; meanwhile, when the medium flows reversely, the fluid medium pushes the ball open by force, the surface of the ball 4 is matched with the tight contact surface of the sealing valve seat 2 and is separated, and the sealing when the medium flows reversely can not be ensured.
Therefore, the conventional metal hard-seal floating seal ball valve has the defects that the valve cannot adapt to the medium working condition requiring tight sealing and cannot adapt to the medium working condition requiring reverse sealing.
Disclosure of Invention
An object of the utility model is to prior art's defect and not enough, provide a two-way doublestage metal hard seal ball valve that floats of simple structure, reasonable in design, convenient to use.
In order to achieve the above object, the utility model adopts the following technical scheme: the valve comprises a valve body, a sealing valve seat, a ball body, a valve rod, a filler pressing sleeve, a valve body bracket, a filler screw, a valve body screw, a supporting valve seat, a supporting sleeve, a disc spring and a thrust snap ring; the valve body support is arranged in the middle of the top end of the valve body; the sealing valve seat and the supporting valve seat are arranged in the inner hole of the valve body; a spherical assembling space is formed between the sealing valve seat and the supporting valve seat; the ball is arranged in the spherical surface assembling space and is matched and connected with the sealing valve seat and the supporting valve seat; a supporting sleeve and an anti-thrust snap ring are arranged at one end of the supporting valve seat far away from the sealing valve seat, and a disc spring is arranged between the supporting sleeve and the supporting valve seat; the packing is sleeved above the valve body; a filler is arranged between the filler pressing sleeve and the valve body; the valve rod penetrates through the valve body bracket, the packing pressing sleeve and the valve body to be connected with the ball body; the device is characterized by also comprising a sealing valve seat gasket, a front-end anti-extrusion ring, a supporting valve seat sealing ring and a rear-end anti-extrusion ring; the sealing valve seat gasket is arranged between the sealing valve seat and the valve body; the rear end anti-extrusion ring is arranged at one end of the support sleeve close to the sealing valve seat; the supporting valve seat sealing ring is arranged at one end of the rear end anti-extrusion ring away from the supporting sleeve; the front end anti-extrusion ring is arranged at one end of the supporting valve seat sealing ring far away from the rear end anti-extrusion ring;
furthermore, the surface of the ball body is matched with the surfaces of the sealing valve seat and the supporting valve seat and is tightly attached in a sealing way, and a gap is formed between the bottom end of the ball body and the top end of the inner wall of the valve body;
furthermore, one end of the sealing valve seat far away from the supporting valve seat is tightly matched with the inner hole of the valve body; the sealing valve seat is tightly matched with the inner hole surface A of the valve body to form a first valve body-sealing valve seat sealing pair, the sealing valve seat is tightly matched with a sealing valve seat gasket and the bottom surface of the inner hole of the valve body to form a second valve body-sealing valve seat sealing pair, and the sealing valve seat is tightly matched with the surface of a ball body to form a ball body-sealing valve seat sealing pair;
further, the supporting valve seat is tightly matched with the front-end anti-extrusion ring, the supporting valve seat sealing ring, the rear-end anti-extrusion ring and the inner hole surface B of the valve body to form a valve body-supporting valve seat sealing pair; the support valve seat is tightly matched with the surface of the ball body to form a ball body-support valve seat sealing pair;
furthermore, a supporting sleeve boss is arranged at the front end of the supporting sleeve;
further, the valve body bracket is fixed above the valve body through a valve body screw;
further, the packing pressing sleeve is fixed above the valve body through a packing screw.
After adopting above-mentioned structure, compare with prior art, a two-way doublestage metal ball valve that floats sealed firmly, have following advantage:
1. the double-stage sealing is provided for the forward direction of the medium flow, so that the forward sealing reliability and tightness of the valve are greatly ensured;
2. double-stage sealing is provided for medium flow direction reverse low pressure, and the reverse sealing reliability and tightness of the valve are greatly ensured;
3. provides a seal for high pressure against the reverse direction of the media flow, which is not available in conventional metal hard seal floating ball valves;
4. the sealing device is suitable for the working condition with medium flow directions in the positive and negative directions, and can keep strict and reliable sealing performance.
5. Has the advantages of simple structure, reasonable arrangement, low manufacturing cost and the like.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.
Fig. 1 is a schematic structural diagram of the present invention;
FIG. 2 is a schematic structural diagram of a conventional metal hard floating seal ball valve;
FIG. 3 is a schematic structural view of a valve body;
FIG. 4 is a schematic view of a support sleeve construction;
FIG. 5 is an enlarged view of a portion of FIG. 1 at A;
FIG. 6 is a partial enlarged view at B of FIG. 1;
FIG. 7 is a schematic diagram of the forward flow operation of the present invention;
FIG. 8 is a schematic view of the reverse flow low pressure operation of the present invention;
fig. 9 is a schematic diagram of the reverse flow high pressure operation of the present invention.
Description of reference numerals:
1. a valve body; 2. sealing the valve seat; 3. sealing the valve seat gasket; 4. a sphere; 5. a valve stem; 6. a filler; 7. pressing and sleeving the filler; 8. a valve body support; 9. a filler screw; 10. a valve body screw; 11. a support valve seat; 12. a support sleeve; 13. a disc spring; 14. a thrust snap ring; 15. a front end anti-extrusion ring; 16. a supporting valve seat sealing ring; 17. a rear end anti-extrusion ring; 18. the bottom surface of the inner hole of the valve body; 19. the bottom surface A of the inner hole of the valve body; 20. the bottom surface B of the inner hole of the valve body; 21. supporting the boss of the sleeve; 18A1, valve body-sealing valve seat sealing pair I; 18A2, and a second valve body-sealing valve seat sealing pair; 18B, a ball-sealing valve seat sealing pair; 20A, a valve body-supporting valve seat sealing pair; 20B, ball-supporting seat seal pair.
Detailed Description
The present invention will be further described with reference to the accompanying drawings.
Referring to fig. 1 and fig. 3 to 6, the technical solution adopted by the present embodiment is: the valve comprises a valve body 1, a sealing valve seat 2, a sealing valve seat gasket 3, a ball 4, a valve rod 5, a filler 6, a filler pressing sleeve 7, a valve body bracket 8, a filler screw 9, a valve body screw 10, a supporting valve seat 11, a supporting sleeve 12, a disk spring 13, a thrust snap ring 14, a front-end anti-extrusion ring 15, a supporting valve seat sealing ring 16 and a rear-end anti-extrusion ring 17; the valve body bracket 8 is fixed in the middle of the top end of the valve body 1 through a valve body screw 10; the sealing valve seat 2 and the supporting valve seat 11 are arranged in the inner hole of the valve body 1; the sealing valve seat gasket 3 is arranged between the sealing valve seat 2 and the valve body 1; a spherical assembling space is formed between the sealing valve seat 2 and the supporting valve seat 11; the ball 4 is arranged in the spherical surface assembling space, the surface of the ball 4 is matched with the surfaces of the sealing valve seat 2 and the supporting valve seat 11 and is tightly attached in a sealing way, and a gap is formed between the bottom end of the ball 4 and the top end of the inner wall of the valve body 1;
a supporting sleeve 12 and a thrust snap ring 14 are arranged at one end, away from the sealing valve seat, of the supporting valve seat 11, a disc spring 13 is arranged between the supporting sleeve 12 and the supporting valve seat, and the disc spring 13 tightly presses the supporting valve seat 11, so that the sealing valve seat 2, the supporting valve seat 11 and the ball 4 are tightly attached; one end of the support sleeve 12 close to the sealing valve seat 2 is provided with a rear-end anti-extrusion ring 17, one end of the rear-end anti-extrusion ring 17 far away from the support sleeve 12 is provided with a support valve seat sealing ring 16, and one end of the support valve seat sealing ring 16 far away from the rear-end anti-extrusion ring 17 is provided with a front-end anti-extrusion ring 15;
the front end of the support sleeve is provided with a support sleeve boss 21 which is used for propping against the support valve seat 11 when the medium flows to reverse high pressure, so that the support valve seat 11 can not generate large deviation towards the right side, and the disc spring 13 can be prevented from being excessively compressed;
the packing pressing sleeve 7 is fixed above the valve body 1 through a packing screw 9, the packing 6 is arranged between the packing pressing sleeve 7 and the valve body 1, and the packing 6 is tightly pressed by screwing the packing pressing sleeve 7 to seal the valve body 1 and the valve rod 5; the valve rod 5 penetrates through the valve body bracket 8, the packing pressing sleeve 7, the packing 6 and the valve body 1 to be mechanically connected with the ball body 4, and the valve rod 5 is driven by the actuator to drive the ball body 4 to rotate by 90 degrees so as to control the opening and closing of the ball valve to cut off or open a pipeline medium;
the sealing valve seat 2 is tightly matched with the surface of the ball 4 to form a ball-sealing valve seat sealing pair 18B;
the excircle of one end of the sealing valve seat 2, which is far away from the sphere 4, is tightly matched with the inner hole surface A19 of the valve body to form a first valve body-sealing valve seat sealing pair 18A 1; the bottom surface of one end of the sealing valve seat 2, which is far away from the ball body 4, forms a valve body-sealing valve seat sealing pair II 18A2 together with the sealing valve seat gasket 3 and the bottom surface 18 of the inner hole of the valve body, and the valve body-sealing valve seat sealing pair formed by combining the valve body-sealing valve seat sealing pair I18A 1 and the valve body-sealing valve seat sealing pair II 18A2 together;
the support valve seat 11 is matched, sealed and tightly attached to the surface of the ball 4 to form a ball-support valve seat sealing pair 20B; the excircle of one end of the support valve seat 11 far away from the ball 4 is tightly attached to a front-end anti-extrusion ring 15, a support valve seat seal ring 16, a rear-end anti-extrusion ring 17 and a valve body inner hole surface B20 to form a valve body-support valve seat seal pair 20A.
The working principle of the utility model is as follows:
firstly, when the medium flows to the positive direction: referring to fig. 7, the medium flows from the right end of the valve, and at this time, when the valve is closed, the fluid medium is cut off, and the valve body-supporting valve seat sealing pair 20A and the ball-supporting valve seat sealing pair 20B form the first-stage positive seal of the valve; the second stage positive seal of the valve is formed by a valve body-sealing valve seat sealing pair and a ball-sealing valve seat sealing pair 18B.
Secondly, when the medium flows to the reverse low pressure: referring to fig. 8, the medium flows into the left end of the valve, the medium pressure is low, the medium thrust is smaller than the elastic force of the disc spring 13, at this time, the ball 4 is still pressed tightly on the sealing valve seat 2 by the elastic force of the disc spring 13 through the support valve seat 11, when the valve is closed, the fluid medium is cut off, and the valve body-sealing valve seat sealing pair and the ball-sealing valve seat sealing pair 18B form the first-stage reverse sealing of the valve; the valve body-supporting seat seal pair 20A and the ball-supporting seat seal pair 20B form a second stage of reverse seal of the valve.
Thirdly, when the medium pressure is high pressure: referring to fig. 9, the medium flows into from the left end of the valve, the medium thrust is greater than the elastic force of the disc spring 13, the ball 4 is pushed by the medium force and moves leftwards until the bottom surface of the left end of the support valve seat 11 is supported by the support sleeve boss 21 and then does not move, at this time, the ball 4 is separated from the seal valve seat 2, and the fluid medium passes through the ball-seal valve seat seal pair 18B; fluid flow to the support ball-support seat seal pair 20B is blocked and the valve body-support seat seal pair 20A is functioning, so that the valve body-support seat seal pair 20A and the ball-support seat seal pair 20B form a high pressure reverse seal for the valve.
The above description is only for the purpose of illustrating the technical solutions of the present invention and not for the purpose of limiting the same, and other modifications or equivalent replacements made by those of ordinary skill in the art to the technical solutions of the present invention should be covered within the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solutions of the present invention.

Claims (7)

1. A bidirectional two-stage metal hard seal floating ball valve comprises a valve body, a seal valve seat, a ball body, a valve rod, a filler pressing sleeve, a valve body bracket, a filler screw, a valve body screw, a support valve seat, a support sleeve, a disc spring and a thrust snap ring; the valve body support is arranged in the middle of the top end of the valve body; the sealing valve seat and the supporting valve seat are arranged in the inner hole of the valve body; a spherical assembling space is formed between the sealing valve seat and the supporting valve seat; the ball is arranged in the spherical surface assembling space and is matched and connected with the sealing valve seat and the supporting valve seat; a supporting sleeve and an anti-thrust snap ring are arranged at one end of the supporting valve seat far away from the sealing valve seat, and a disc spring is arranged between the supporting sleeve and the supporting valve seat; the packing is sleeved above the valve body; a filler is arranged between the filler pressing sleeve and the valve body; the valve rod penetrates through the valve body bracket, the packing pressing sleeve and the valve body to be connected with the ball body, and is characterized by also comprising a sealing valve seat gasket, a front-end anti-extrusion ring, a supporting valve seat sealing ring and a rear-end anti-extrusion ring; the sealing valve seat gasket is arranged between the sealing valve seat and the valve body; the rear end anti-extrusion ring is arranged at one end of the support sleeve close to the sealing valve seat; the supporting valve seat sealing ring is arranged at one end of the rear end anti-extrusion ring away from the supporting sleeve; the front end anti-extrusion ring is arranged at one end of the supporting valve seat sealing ring far away from the rear end anti-extrusion ring.
2. The bidirectional double-stage metal hard seal floating ball valve as recited in claim 1, wherein the surface of the ball body is matched with and closely sealed with the surfaces of the sealing valve seat and the supporting valve seat, and a gap is formed between the bottom end of the ball body and the top end of the inner wall of the valve body.
3. The bi-directional dual-stage metal-to-metal hard-seal floating ball valve of claim 1, wherein the end of the sealing valve seat away from the supporting valve seat is tightly fitted with the inner hole of the valve body; the sealing valve seat is tightly matched with the inner hole surface A of the valve body to form a first valve body-sealing valve seat sealing pair, the sealing valve seat is tightly matched with the sealing valve seat gasket and the bottom surface of the inner hole of the valve body to form a second valve body-sealing valve seat sealing pair, and the sealing valve seat is tightly matched with the surface of a ball body to form a ball body-sealing valve seat sealing pair.
4. The bidirectional two-stage metal hard seal floating ball valve according to claim 1, wherein the support valve seat is tightly matched with the front-end anti-extrusion ring, the support valve seat seal ring, the rear-end anti-extrusion ring and the valve body inner hole surface B to form a valve body-support valve seat seal pair; the support valve seat is tightly matched with the surface of the ball body to form a ball body-support valve seat sealing pair.
5. The bi-directional two-stage metal-to-metal floating ball valve of claim 1, wherein the support sleeve has a support sleeve boss at the front end.
6. The bi-directional dual stage metal-to-metal floating ball valve of claim 1 wherein said valve body bracket is secured to said valve body by means of valve body screws.
7. The bi-directional dual-stage metal-to-metal floating ball valve of claim 1, wherein the packing gland is secured above the valve body by a packing screw.
CN202023056361.8U 2020-12-17 2020-12-17 Two-way two-stage metal hard seal floating ball valve Active CN214197357U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202023056361.8U CN214197357U (en) 2020-12-17 2020-12-17 Two-way two-stage metal hard seal floating ball valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202023056361.8U CN214197357U (en) 2020-12-17 2020-12-17 Two-way two-stage metal hard seal floating ball valve

Publications (1)

Publication Number Publication Date
CN214197357U true CN214197357U (en) 2021-09-14

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ID=77653698

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202023056361.8U Active CN214197357U (en) 2020-12-17 2020-12-17 Two-way two-stage metal hard seal floating ball valve

Country Status (1)

Country Link
CN (1) CN214197357U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113863887A (en) * 2021-09-22 2021-12-31 北京捷杰西石油设备有限公司 IBOP for top drive

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113863887A (en) * 2021-09-22 2021-12-31 北京捷杰西石油设备有限公司 IBOP for top drive
CN113863887B (en) * 2021-09-22 2023-10-13 北京捷杰西石油设备有限公司 IBOP for top drive

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