CN217301675U

CN217301675U - Throttle valve internal protection structure

Info

Publication number: CN217301675U
Application number: CN202221237327.7U
Authority: CN
Inventors: 韩泽海; 赵文婷
Original assignee: Dhv Valve & Foundry Suzhou Co ltd
Current assignee: Dhv Valve & Foundry Suzhou Co ltd
Priority date: 2022-05-23
Filing date: 2022-05-23
Publication date: 2022-08-26
Anticipated expiration: 2032-05-23

Abstract

The utility model relates to an inside protective structure of choke valve, establish the sliding sleeve on a throttle section of thick bamboo outer top including valve body, setting at the throttle section of thick bamboo and the cover of valve body lumen, the sliding sleeve inner wall is provided with the bush with a throttle section of thick bamboo sliding fit, and the top is provided with can dismantle the guard plate of being connected with the bush in the sliding sleeve, the circumference equipartition has a plurality of orifice on the throttle section of thick bamboo, the aperture of orifice is not less than 50 mm. The internal protection structure of the throttle valve is protected by the bushing, namely the protection plate, so that the anti-scouring effect inside the sliding sleeve can be effectively improved, and the service life of the valve is prolonged; the traditional large-number small-aperture throttling holes are changed into the small-number large-aperture throttling holes, so that the throttling effect can be effectively reduced, and the abrasion and the noise are reduced; the sealing performance of each point of the valve is reliable, and the influence of medium flow channel crystallization on use can be prevented.

Description

Throttle valve internal protection structure

Technical Field

The utility model relates to a choke valve technical field, in particular to inside protective structure of choke valve.

Background

As one of the control valves, a throttle valve is widely used in practice. For the outer sliding sleeve type throttle valve, the valve fails in advance due to the throttling effect in the flow adjusting process and the serious scouring corrosion in the area due to the fact that the inner top area of the sliding sleeve is not protected in the using process. In addition, the throttling cylinder basically adopts a hole opening mode with a plurality of small holes, so that the throttling effect is increased, and unnecessary washing is generated inside the valve.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the technical problem that will solve is: in order to overcome the defects of the prior art, the internal protection structure of the throttle valve is provided.

In order to achieve the above technical effect, the utility model discloses a technical scheme is: the utility model provides an inside protective structure of choke valve, includes the valve body, sets up a throttle section of thick bamboo and the cover of establishing at the valve body lumen and establish the sliding sleeve on throttle section of thick bamboo outer top, the sliding sleeve inner wall be provided with a throttle section of thick bamboo sliding fit's bush, the top is provided with the guard plate of can dismantling the connection with the bush in the sliding sleeve, the circumference equipartition has a plurality of orifice on the throttle section of thick bamboo, the aperture of orifice is not less than 50 mm.

Further, the upper end of the lining is provided with a coaxial bulge, the lower end of the protection plate is provided with a coaxial groove, and the bulge and the groove are installed in a transition fit mode.

Further, the bushing and the shield plate are both made of cemented carbide, wherein the cemented carbide includes any one of tungsten carbide, titanium carbide, niobium carbide, and vanadium carbide.

Furthermore, the outer bottom sleeve of the throttling cylinder is provided with a valve seat fixed in the middle cavity of the valve body, and a first sealing ring is arranged between the valve seat and the valve body.

Furthermore, a second sealing ring is arranged between the bottom of the bushing and the valve seat, a third sealing ring is arranged between the top of the bushing and the throttling cylinder, and the throttling hole is arranged between the second sealing ring and the third sealing ring.

Furthermore, a valve cover is arranged above the valve body, and a winding pad and a fourth sealing ring are arranged between the valve cover and the valve body.

Further, a through hole in sliding fit with the sliding sleeve is formed in the center of the valve cover, and a fifth sealing ring is arranged between the valve cover and the sliding sleeve.

Furthermore, an inlet runner and an outlet runner which are connected with the middle cavity of the valve body are further arranged on the valve body, and anti-sticking layers are arranged on the inner walls of the inlet runner and the outlet runner.

Furthermore, a pressure relief flow passage connected with the middle cavity of the valve body is further formed in the valve body, and a plug screw connected with the valve body is arranged in the pressure relief flow passage.

Furthermore, a detachable filter element is arranged in the inlet flow passage, and the filter element comprises a first-stage filter layer, a second-stage filter layer and a third-stage filter layer, wherein the filter precision of the first-stage filter layer is increased progressively along the direction of the medium flow.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the lining, namely the protection plate, is used for protection, so that the anti-scouring effect inside the sliding sleeve can be effectively improved, and the service life of the valve is prolonged;

2. the traditional large number of small-aperture throttling holes are changed into the small number of large-aperture throttling holes, so that the throttling effect can be effectively reduced, and the abrasion and the noise are reduced;

3. the sealing performance of each point of the valve is reliable, and the influence of medium flow channel crystallization on use can be prevented.

The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood, the present invention may be implemented according to the content of the description, and in order to make the above and other objects, features, and advantages of the present invention more clearly understood, the present invention will be described in further detail with reference to the accompanying drawings and embodiments, and it is obvious that the described embodiments are some, but not all embodiments of the present invention.

Drawings

Fig. 1 is a schematic structural view of the internal protection structure of the throttle valve of the present invention;

FIG. 2 is a schematic view of the connection structure of the lining and the protection plate of the present invention;

FIG. 3 is a schematic view of the filter element structure of the present invention;

the reference numbers and corresponding designations in the drawings are: 1. the novel filter comprises a valve body, an inlet flow passage, a valve body, an outlet flow passage, a pressure relief flow passage, a throttling cylinder, a throttling hole, a sliding sleeve, a bushing, a protrusion, a protection plate, a groove, a valve seat, a first sealing ring, a second sealing ring, a valve seat, a valve cover, a winding pad, a fourth sealing ring, a valve seat, a first sealing ring, a second sealing ring, a valve seat, a valve cover, a winding pad, a fourth sealing ring, a third sealing ring, a valve cover, a screw plug, a filter element, a first filtering layer, a second filtering layer and a second filtering layer, wherein the inlet flow passage is 1a, the outlet flow passage is 1b, the pressure relief flow passage is 1c, the throttling cylinder, the throttling hole, the sliding sleeve, the bushing, the protrusion, the protection plate, the groove, the valve seat, the second sealing ring, the third sealing ring, the valve cover, the winding pad, the fourth sealing ring, the screw plug, the filter element, the first filtering layer, the second filtering layer and the second filtering layer are 1c.

Detailed Description

The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic drawings and illustrate the basic structure of the present invention only in a schematic manner, and thus show only the components related to the present invention.

Please refer to fig. 1, the utility model provides an inside protective structure of choke valve, including valve body 1, set up throttle section of thick bamboo 2 and the cover in the cavity of valve body 1 and establish the sliding sleeve 3 on throttle section of thick bamboo 2 outer top, 3 inner walls of sliding sleeve be provided with throttle section of thick bamboo 2 sliding fit's bush 4, the top is provided with the guard plate 5 of being connected with bush 4 can dismantle in the sliding sleeve 3, throttle section of thick bamboo 2 goes up the circumference equipartition and has a plurality of orifice 2a, the aperture of orifice 2a is not less than 50 mm.

Above-mentioned structure can protect 3 inner walls of sliding sleeve and interior top through installation bush 4 and guard plate 5 in sliding sleeve 3, avoids the medium to erode the corruption and causes the valve to become invalid in advance. Make bush 4 and guard plate 5 into the form of dismantling the connection, arbitrary side damages all can independently be replaced in order to save cost, and concrete connection structure does not do the restriction (please refer to fig. 2) for example, this embodiment is provided with coaxial arch 4a in bush 4 upper end, and the guard plate 5 lower extreme is provided with coaxial recess 5a, after arch 4a and recess 5a transition fit installation, makes bush 4 and guard plate 5 be linked into a whole, and the inner chamber of the sliding sleeve 3 of packing into can be used to the scour protection. To improve the erosion resistance, the bushing 4 and the guard plate 5 are made of a hard alloy, such as any one of tungsten carbide, titanium carbide, niobium carbide, and vanadium carbide.

In addition, the mode of opening a plurality of small holes (the hole diameter is less than 30mm) on the throttling cylinder 2 is cancelled, and the mode of opening a large hole is changed into the mode of opening a large hole, so that the throttling effect is reduced, and the abrasion and the reduction are further reduced. For example, in the present embodiment, the throttle cylinder 2 is designed with two rows of four holes, the front and rear throttle holes 2a have a hole diameter of 60mm, and the left and right throttle holes 2a have a hole diameter of 50 mm.

In some embodiments, a valve seat 6 fixed in a cavity in the valve body 1 is sleeved outside the outer bottom of the throttle cylinder 2, and a first sealing ring 7 is arranged between the valve seat 6 and the valve body 1; a second sealing ring 8 is arranged between the bottom of the bushing 4 and the valve seat 6, a third sealing ring 9 is arranged between the top of the bushing 4 and the throttling cylinder 2, and the throttling hole 2a is arranged between the second sealing ring 8 and the third sealing ring 9; a valve cover 10 is arranged above the valve body 1, and a winding pad 11 and a fourth sealing ring 12 are arranged between the valve cover 10 and the valve body 1; a through hole which is in sliding fit with the sliding sleeve 3 is arranged in the center of the valve cover 10, and a fifth sealing ring 13 is arranged between the valve cover 10 and the sliding sleeve 3.

The valve seat 6 and the valve body 1 are sealed by a first sealing ring 7 to prevent the medium at the inlet flow passage 1a and the medium at the outlet flow passage 1b from leaking; the bottom and the top of the lining 4 are respectively sealed by a second sealing ring 8 and a third sealing ring 9 to prevent the medium at the throttling hole 2a from leaking out under the valve-closed state; the valve cover 10 and the valve body 1 are sealed by a winding pad 11 and a fourth sealing ring 12 to prevent the medium at the valve cover 10 from leaking; the valve cover 10 and the sliding sleeve 3 are sealed by a fifth sealing ring 13 to prevent the medium at the through hole from leaking. In the embodiment, the first sealing ring 7, the third sealing ring 9 and the fourth sealing ring 12 are all O-shaped rings, the second sealing ring 8 is a metal sealing ring to form hard seal with the bottom of the lining 4, and the fifth sealing ring 13 is a lip-shaped sealing ring.

Referring to fig. 1 and 3, in some embodiments, an inlet flow channel 1a and an outlet flow channel 1b connected to a cavity in the valve body 1 are further formed on the valve body 1, and anti-sticking layers are respectively disposed on inner walls of the inlet flow channel 1a and the outlet flow channel 1 b; the valve body 1 is also provided with a pressure relief flow passage 1c connected with the middle cavity of the valve body 1, and a screw plug 14 connected with the valve body 1 is arranged in the pressure relief flow passage 1 c; a detachable filter element 15 is arranged in the inlet flow passage 1a, and the filter element 15 comprises a first-stage filter layer 15a, a second-stage filter layer 15b and a third-stage filter layer 15c with gradually increased filter precision along the medium flow direction.

Antiseized layer is arranged in avoiding the granule in the medium to adhere to crystallization and influences the valve and use, for example this embodiment selects for use Teflon as antiseized layer, and for further reducing the particle impurity in the medium, can locate to install filter core 15 at inlet flow channel 1a, and the filter core 15 of this embodiment has adopted tertiary filtration, the better filtration impurity of ability, and filter core 15 periphery is wrapped has the filter core 15 cover of taking the hem, can be convenient clamp in inlet flow channel 1 a's tip, and the ann tears conveniently open.

In addition, in order to prevent the overlarge pressure caused by the expansion of the medium in the cavity of the valve body 1, a pressure relief flow passage 1c communicated with the cavity is formed in the valve body 1, the medium pressure of the cavity can be released by removing the screw plug 14, and the use safety of the valve is improved.

The present invention is not limited to the above specific embodiments, and for those skilled in the art, the above conception can be used without any creative work, and all the changes made fall within the protection scope of the present invention.

Claims

1. The utility model provides an inside protective structure of choke valve, includes valve body (1), sets up sliding sleeve (3) on throttling cylinder (2) and the cover of valve body (1) lumen establish outside throttling cylinder (2) top, its characterized in that, sliding sleeve (3) inner wall be provided with throttling cylinder (2) sliding fit's bush (4), the top is provided with guard plate (5) of dismantling the connection with bush (4) in sliding sleeve (3), the circumference equipartition has a plurality of orifice (2a) on throttling cylinder (2), the aperture of orifice (2a) is not less than 50 mm.

2. The throttle valve internal guard structure as defined in claim 1 wherein said bushing (4) is provided at its upper end with a coaxial protrusion (4a), said guard plate (5) is provided at its lower end with a coaxial recess (5a), and said protrusion (4a) is installed in transition fit with said recess (5 a).

3. The throttle valve internal guard structure according to claim 2, characterized in that the bushing (4) and the guard plate (5) are each made of cemented carbide, wherein the cemented carbide includes any one of tungsten carbide, titanium carbide, niobium carbide, and vanadium carbide.

4. The internal protection structure for a throttle valve according to claim 1, characterized in that the outer bottom of the throttle cylinder (2) is sleeved with a valve seat (6) fixed in the cavity of the valve body (1), and a first sealing ring (7) is arranged between the valve seat (6) and the valve body (1).

5. The internal throttle valve protection structure according to claim 4, wherein a second sealing ring (8) is arranged between the bottom of the bushing (4) and the valve seat (6), a third sealing ring (9) is arranged between the top of the bushing (4) and the throttle cylinder (2), and the throttle hole (2a) is arranged between the second sealing ring (8) and the third sealing ring (9).

6. The throttle valve internal protection structure according to claim 5, characterized in that a valve cover (10) is arranged above the valve body (1), and a winding pad (11) and a fourth sealing ring (12) are arranged between the valve cover (10) and the valve body (1).

7. The throttle valve internal protection structure according to claim 6, wherein the valve cover (10) is centrally provided with a through hole in sliding fit with the sliding sleeve (3), and a fifth sealing ring (13) is arranged between the valve cover (10) and the sliding sleeve (3).

8. The throttle valve internal protection structure according to claim 1, wherein the valve body (1) is further provided with an inlet flow passage (1a) and an outlet flow passage (1b) which are connected with a middle cavity of the valve body (1), and the inner walls of the inlet flow passage (1a) and the outlet flow passage (1b) are provided with anti-sticking layers.

9. The throttle valve internal protection structure according to claim 8, wherein the valve body (1) is further provided with a pressure relief flow passage (1c) connected with the middle cavity of the valve body (1), and a plug screw (14) connected with the valve body (1) is arranged in the pressure relief flow passage (1 c).

10. The throttle valve internal guard structure according to claim 8, wherein a removable filter element (15) is provided in the inlet flow path (1a), and the filter element (15) includes a primary filter layer (15a), a secondary filter layer (15b) and a tertiary filter layer (15c) having increasing filtration accuracy in a direction of a medium flow.