Large-diameter gate valve

Abstract

The utility model discloses a large-diameter gate valve, belongs to the technical field of valve structures, and provides a food-grade large-diameter gate valve which is light in structure and firm in flange connection. The large-diameter gate valve comprises a valve body, the valve body is connected with a double-bearing elbow through a clamping flange and a flange A, the valve body is connected with a main pipe body through a flange B, and the valve body comprises a pair of packaging plates. A valve plate frame is fixedly connected between the packaging plates, a knife-shaped valve plate is movably connected between the packaging plates, the knife-shaped valve plate is suitable for being inserted into the valve plate frame, a valve cavity is formed between the inner wall of the valve plate frame and the opposite side faces of the two packaging plates, and the valve cavity is suitable for being matched with the knife-shaped valve plate to form a sliding pair. The gate valve is designed in a PE plate cutting and overlapping splicing mode, the weight of the gate valve is effectively reduced, compared with a gate valve made of a metal material, the gate made of the PE material does not need an additional supporting structure or a sealing structure, and therefore the structure is lighter, large installation burden cannot be brought to a pool body, and the service life of the gate valve is prolonged. And the applicability of configuration and installation is wider.

Description

Technical Field

[0001] This application relates to the technical field of valve structures, and particularly to a large-diameter gate valve. Background Art

[0002] Currently, gate valves are mostly made of metal materials. Since large-diameter metal gate valves are relatively heavy and are mostly installed in a single-sided hanging manner, the pool body is difficult to bear the installation load. Therefore, additional support components need to be configured during installation, and the installation is not convenient. In addition, the traditional metal materials used to make gate valves cannot meet the food-grade hygiene requirements. Summary of the Invention

[0003] The purpose of this application is to provide a food-grade large-diameter gate valve with a light structure and a firmly connected flange.

[0004] To achieve the above object, this application provides a large-diameter gate valve: including a valve body, the valve body is connected with a double socket elbow through a clamping flange and a flange A, the valve body is connected with a main pipe body through a flange B, the valve body includes a pair of encapsulation plates, a valve plate frame is fixedly connected between the encapsulation plates, a knife-shaped valve plate is movably connected between the encapsulation plates, the knife-shaped valve plate is adapted to be inserted into the valve plate frame, a valve cavity is formed between the inner wall of the valve plate frame and the opposite sides of the two encapsulation plates, which is adapted to cooperate with the knife-shaped valve plate to form a sliding pair, the encapsulation plates have convection ports communicating with the double socket elbow, the main pipe body and the valve cavity, a filter screen is also fixedly connected between the valve plate frame and the encapsulation plates, and the knife-shaped valve plate, the valve plate frame, the filter screen and the encapsulation plates are all made of polyethylene materials, with good toughness, low density and being safer and more hygienic than metal materials.

[0005] As a preference, the clamping flange and the flange A are fixedly connected to the valve body through connecting parts, the flange B is fixedly connected to the valve body through connecting parts, the connecting parts include bolt bodies of several models and nuts that cooperate with the bolt bodies, the bolt bodies are divided into bolt A, bolt B, bolt C and bolt D, all of which are adapted to cooperate with the nuts of the same model, which is more convenient for the configuration of the connecting parts.

[0006] As a preference, both the flange A and the flange B include connection plates, several second through holes are opened on the connection plates, one end of the connection plate has a fitting sleeve, and a rib plate is arranged between the outer side surface of the fitting sleeve and the end surface of the connection plate, so that the flange itself has a relatively high structural strength.

[0007] As a preference, the inner wall of the fitting sleeve of the flange A is smooth. The end of the double socket elbow has an embedded ring adapted to be embedded in the fitting sleeve of the flange A. One end of the clamping flange has a pipe sleeve adapted to be sleeved outside the main body part of the double socket elbow. A snap ring is further provided between the embedded ring and the double socket elbow and is adapted to be clamped between the clamping flange and the fitting sleeve of the flange A to limit the degree of freedom of the double socket elbow.

[0008] As a preference, several fifth through holes are provided in the part of the encapsulation plate outside the valve cavity. The valve plate frame is provided with a third through hole penetrating both end faces, and the filter screen is provided with a fourth through hole penetrating both end faces. The number and positions of the third through hole and the fourth through hole correspond to those of the fifth through holes respectively and are adapted to allow the bolt body to pass through, so as to realize the fastening connection between components.

[0009] As a preference, the bolt C passes through the first through hole, the second through hole on the flange A, the fifth through hole, the fourth through hole, the third through hole, the fifth through hole on the other side, and the second through hole on the flange B in sequence and then cooperates with the nut; the bolt D passes through the second through hole on the flange A, the fifth through hole, the fourth through hole, the third through hole, the fifth through hole on the other side, and the second through hole on the flange B in sequence and then cooperates with the nut, so as to fix all the flanges and the valve body simultaneously.

[0010] As a preference, several blind holes are provided on the outer sides of both encapsulation plates. The blind holes and the fifth through holes on a single encapsulation plate jointly correspond to the second through holes on the flange A or the flange B. The blind holes and the fifth through holes on a single encapsulation plate jointly form a ring, so as to realize a more uniform circumferential connection.

[0011] As a preference, the bolt A passes through the second through hole on the flange A and is threadedly connected to the blind hole, and the bolt A also passes through the second through hole on the flange B and is threadedly connected to the blind hole on the other encapsulation plate; the bolt B passes through the first through hole and the second through hole on the flange A in sequence and is threadedly connected to the blind hole, further improving the connection stability between the flange and the valve body.

[0012] As a preference, an internal thread is provided on the inner wall of the fitting sleeve of the flange B. One end of the main pipe body is a fitting ring, and an external thread is provided on the outer side of the fitting ring. After being matched with the internal thread, the joint between the main pipe body and the flange B is welded to prevent relative rotation between the pipeline and the flange.

[0013] As a preference, the upper end of the knife-shaped valve plate is located outside the valve plate frame and is provided with a force application groove for cooperating with a lifting mechanism to adjust the height of the knife-shaped valve plate.

[0014] Compared with the prior art, the beneficial effects of this application are as follows:

[0015] (1) By designing the gate valve by adopting the PE board cutting and overlapping assembly method, the weight of the gate valve is effectively reduced. Compared with the gate valve made of metal materials, the gate made of PE material does not require additional support structure and sealing structure. Therefore, the structure is lighter and will not bring a large installation burden to the pool body, and the applicability of configuration and installation is wider;

[0016] (2) By threading the flange and the pipeline and then welding, the pipeline will not rotate relative to the valve body, and the connection is tighter and more stable. On the other hand, using multi-type connectors to synchronously restrain the flange and the valve body not only ensures the overall firmness of the valve body, but also has fewer disassembly steps and is faster when performing disassembly operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is the first three-dimensional schematic diagram of the general assembly structure of this large-diameter gate valve.

[0018] Figure 2 It is the second three-dimensional schematic diagram of the general assembly structure of this large-diameter gate valve.

[0019] Figure 3 It is the three-dimensional structure schematic diagram of the connection between the flange and the valve body of this large-diameter gate valve.

[0020] Figure 4 It is the first three-dimensional structure schematic diagram of the connection relationship of the flange of this large-diameter gate valve.

[0021] Figure 5 It is the second three-dimensional structure schematic diagram of the connection relationship of the flange of this large-diameter gate valve.

[0022] Figure 6 It is the first view of the three-dimensional structure of the connection between the clamping flange and flange A of this large-diameter gate valve.

[0023] Figure 7 It is the second view of the three-dimensional structure of the connection between the clamping flange and flange A of this large-diameter gate valve.

[0024] Figure 8 It is the layout diagram of different bolt bodies on flange A of this large-diameter gate valve.

[0025] Figure 9 It is the cross-sectional view of the three-dimensional structure of the clamping flange of this large-diameter gate valve.

[0026] Figure 10 It is the cross-sectional view of the three-dimensional structure of the double socket elbow of this large-diameter gate valve.

[0027] Figure 11 It is the three-dimensional structure schematic diagram of flange B of this large-diameter gate valve.

[0028] Figure 12 It is a three-dimensional structural sectional view of the main pipe body of the large-diameter gate valve.

[0029] Figure 13 It is a three-dimensional structural schematic diagram of the valve body of the large-diameter gate valve.

[0030] Figure 14 It is a three-dimensional structural sectional view of the valve body of the large-diameter gate valve.

[0031] Figure 15 It is a layout diagram of the knife-shaped valve plate of the large-diameter gate valve within the valve plate frame.

[0032] Figure 16 It is a three-dimensional structural schematic diagram of the valve plate frame of the large-diameter gate valve closely attached to the filter screen.

[0033] In the figure: 1, double-end elbow; 101, snap ring; 102, embedded ring; 2, clamping flange; 201, pipe sleeve; 202, first through hole; 3, flange A; 341, connecting plate; 342, fitting sleeve; 343, second through hole; 344, rib plate; 4, flange B; 401, internal thread; 5, valve body; 510, knife-shaped valve plate; 511, force application groove; 520, valve plate frame; 521, valve cavity; 522, third through hole; 530, filter screen; 531, fourth through hole; 540, encapsulation plate; 541, convection port; 542, fifth through hole; 543, blind hole; 6, connecting piece; 610, bolt body; 611, bolt A; 612, bolt B; 613, bolt C; 614, bolt D; 620, nut; 7, main pipe body; 701, fitting ring; 702, external thread. Specific embodiments

[0034] Next, in combination with specific embodiments, the present application will be further described. It should be noted that, on the premise of no conflict, the following-described embodiments or technical features can be arbitrarily combined to form new embodiments.

[0035] In the description of the present application, it should be noted that for orientation terms, such as terms "center", "horizontal", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., the orientation and position relationships indicated are based on the orientation or position relationships shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and should not be construed as limiting the specific protection scope of the present application.

[0036] It should be noted that the terms "first", "second", etc. in the description and claims of this application are used to distinguish similar objects and do not necessarily describe a specific order or sequence.

[0037] The terms "comprising" and "having" in the description and claims of this application, as well as any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units need not be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products, or devices.

[0038] As Figure 1-16 shown in the large-diameter gate valve, it includes a longitudinally placed valve body 5. The valve body 5 includes a pair of encapsulation plates 540. The structures of the two encapsulation plates 540 are the same and symmetrical to each other. A U-shaped valve plate frame 520 is fixedly connected between the encapsulation plates 540. The opening of the valve plate frame 520 faces upward. A knife-shaped valve plate 510 is movably connected between the encapsulation plates 540. The lower end of the knife-shaped valve plate 510 is semicircular and just fits into the valve plate frame 520. A valve cavity 521 is formed between the inner wall of the valve plate frame 520 and the opposite sides of the two encapsulation plates 540 for cooperating with the knife-shaped valve plate 510 to form a sliding pair. The knife-shaped valve plate 510 can slide up and down in the vertical direction to achieve the opening and closing actions. The upper end of the knife-shaped valve plate 510 is located outside the valve plate frame 520, that is, even when fully closed, the upper end of the knife-shaped valve plate 510 is higher than the upper end of the valve plate frame 520. A force application groove 511 is also provided at the exposed upper end of the knife-shaped valve plate 510 for cooperating with a lifting mechanism, such as a lever or a lifting rope. The encapsulation plate 540 has a convection port 541 that communicates with the double socket elbow 1, the main pipe body 7, and the valve cavity 521. The convection port 541 is circular and coaxial with the semicircular bottom of the encapsulation plate 540. A filter screen 530 is also fixedly connected between the valve plate frame 520 and the encapsulation plate 540. Usually, only one filter screen 530 needs to be provided. The knife-shaped valve plate 510, the valve plate frame 520, the filter screen 530, and the encapsulation plate 540 are all made of polyethylene, that is, PE material, which is not only light in weight but also can meet the food-grade hygiene requirements. Compared with metal materials, the direct contact of the PE plate has better sealing performance, does not require an additional rubber sealing structure, and the structure is simpler and more convenient to assemble.

[0039] The valve body 5 is connected to a double socket elbow 1 through a clamping flange 2 and a flange A 3. The included angle between the two ends of the double socket elbow 1 is 90°. Moreover, after one end of the double socket elbow 1 is constrained, the other end can be adjusted in angle. The valve body 5 is connected to a main pipe body 7 through a flange B 4. The structures of the flange B 4 and the flange A 3 are similar, except that the flange B 4 is further processed on the basis of the structure of the flange A 3. Specifically: Both the flange A 3 and the flange B 4 include a connection disk 341. A number of second through holes 343 are arranged equidistantly around an axis on the connection disk 341. One end of the connection disk 341 has a coaxial fitting sleeve 342. All the second through holes 343 are arranged outside the fitting sleeve 342. A number of rib plates 344 are arranged equidistantly around the axis between the outer side surface of the fitting sleeve 342 and the end face of the connection disk 341. The number of rib plates 344 is the same as the number of second through holes 343, and adjacent second through holes 343 are symmetric about a rib plate 344. In this embodiment, eight second through holes 343 and rib plates 344 are provided on both the flange A 3 and the flange B 4.

[0040] The inner wall of the fitting sleeve 342 of the flange A 3 is smooth. The end of the double socket elbow 1 has an embedded ring 102 for being embedded into the fitting sleeve 342 of the flange A 3 and can rotate relatively. One end of the clamping flange 2 also has a coaxial pipe sleeve 201 that can be sleeved outside the main body part of the double socket elbow 1. There is also a protruding snap ring 101 between the embedded ring 102 and the double socket elbow 1. The outer diameter of the main body part of the double socket elbow 1 is uniform and is greater than the embedded ring 102 and less than the snap ring 101. Therefore, the snap ring 101 can be clamped between the clamping flange 2 and the fitting sleeve 342 of the flange A 3. In this way, the entire double socket elbow 1 cannot move axially and can only rotate around the axis of the clamping flange 2, so as to adjust the angle of the other free end to facilitate cooperation with equipment or other pipelines.

[0041] The inner wall of the fitting sleeve 342 of the flange B 4 is provided with an internal thread 401, which is the only structure different from that of the flange A 3. One end of the main pipe body 7 is a fitting ring 701. The outer side surface of the fitting ring 701 is provided with an external thread 702. Since both the flange B 4 and the main pipe body 7 are made of metal materials, after the external thread 702 of the fitting ring 701 is engaged with the internal thread 401, the joint between the main pipe body 7 and the flange B 4 can be welded. In this way, the connection between the main pipe body 7 and the flange B 4 will be very firm and there will be no relative rotation.

[0042] The clamping flange 2 and the flange A 3 are fixedly connected to the valve body 5 through the connecting member 6, and the flange B 4 is also fixedly connected to the valve body 5 through the connecting member 6. The connecting member 6 includes bolt bodies 610 of several models and nuts 620 that cooperate with the bolt bodies 610. The bolt bodies 610 are divided into bolt A 611, bolt B 612, bolt C 613, and bolt D 614. The four types of bolt bodies 610 only differ in length and have the same pitch, and can all cooperate with nuts 620 of the same model. That is to say, multiple models of nuts 620 are not required, which makes the installation and configuration more convenient.

[0043] The part of the encapsulation plate 540 outside the valve cavity 521 is provided with a number of fifth through holes 542. Near the edge of the semi-circular bottom of the encapsulation plate 540, in order to ensure that the connecting member 6 can restrain the entire valve body 5, a structure allowing the bolt body 610 to penetrate needs to be provided. Therefore, a third through hole 522 penetrating both end faces is provided on the valve plate frame 520, and a fourth through hole 531 penetrating both end faces is provided on the filter screen 530. The number and positions of the third through hole 522 and the fourth through hole 531 correspond to those of the fifth through hole 542 and are used for the bolt body 610 to pass through. The longest bolt C 613 will sequentially pass through the first through hole 202, the second through hole 343 on the flange A 3, the fifth through hole 542, the fourth through hole 531, the third through hole 522, and the fifth through hole 542 on the other side and the second through hole 343 on the flange B 4 and then cooperate with the nut 620 to achieve fastening; and the bolt D 614 will sequentially pass through the second through hole 343 on the flange A 3, the fifth through hole 542, the fourth through hole 531, the third through hole 522, and the fifth through hole 542 on the other side and the second through hole 343 on the flange B 4 and then cooperate with the nut 620 to achieve fastening.

[0044] On the outer sides of the two encapsulation plates 540, that is, the opposite sides, a number of blind holes 543 are provided. The blind holes 543 do not penetrate the inner side of the encapsulation plate 540. Therefore, even if the blind holes 543 are located on the longitudinal projection plane of the valve cavity 521, they will not penetrate the valve cavity 521 and affect the sealing performance of the valve body 5. The blind holes 543 and the fifth through holes 542 on a single encapsulation plate 540 jointly correspond to the second through holes 343 on the flange A3 or the flange B4, and the blind holes 543 and the fifth through holes 542 on a single encapsulation plate 540 jointly form a ring. Therefore, the projections of all the blind holes 543 in the front-back direction fall within the valve cavity 521. This is why only blind holes 543 can be drilled above the fifth through holes 542. The shortest bolt A611 passes through the second through hole 343 on the flange A3 and is threadedly connected to the blind hole 543. Since the PE material is much softer than the metal bolt body 610, even if the inner wall of the blind hole 543 is not pre-tapped, thread fitting can be achieved under the pressing action of the bolt body 610. Also, the bolt A611 passes through the second through hole 343 on the flange B4 and is threadedly connected to the blind hole 543 on another encapsulation plate 540. The bolt B612 passes through the first through hole 202 and the second through hole 343 on the flange A3 in sequence and is threadedly connected to the blind hole 543. The bolt B612 is mainly used to limit the relative positions of the clamping flange 2 and the flange A3. The connection stability between the flange and the valve body 5 and the stability of the valve body 5 itself are mainly maintained by the longer bolts C613 and bolts D614. The shorter bolts A611 and bolts B612 only play an auxiliary connection role to further improve the connection stability between the flange and the valve body 5.

[0045] An alternative solution to the above connection structure: The connection between the flange B4 and the main pipe body 7 can also use large-diameter hot-melt technology, and there is no need for the flange B4 to be threadedly fitted with the main pipe body 7. However, the investment cost of large-diameter hot-melt equipment is relatively high, and there are also high requirements for the roundness accuracy of the pipeline. It is not economical without a certain batch of products.

[0046] The above describes the basic principle, main features and advantages of the present application. Those skilled in the art of this industry should understand that the present application is not limited by the above embodiments. What is described in the above embodiments and the specification is only the principle of the present application. Without departing from the spirit and scope of the present application, the present application will have various changes and improvements, and these changes and improvements all fall within the scope of the present application claimed. The scope of protection required by the present application is defined by the appended claims and their equivalents.

Claims

1. A large-diameter gate valve, characterized in that: The invention comprises a valve body (5), wherein the valve body (5) is connected to a double-socket elbow (1) via a clamping flange (2) and a flange A (3), wherein the valve body (5) is connected to a main pipe (7) via a flange B (4), wherein the valve body (5) comprises a pair of packaging plates (540), wherein a valve plate frame (520) is fixedly connected between the packaging plates (540), wherein a knife-shaped valve plate (510) is movably connected between the packaging plates (540), wherein the knife-shaped valve plate (510) is suitable for being inserted into the valve plate frame (520), wherein the inner wall of the valve plate frame (520) is connected to the two sealing plates. A valve cavity (521) is formed between opposite sides of the packaging plate (540), which is suitable for cooperating with the knife-shaped valve plate (510) to form a sliding pair. The packaging plate (540) has a convection port (541) that communicates with the double-socket elbow (1), the main pipe body (7) and the valve cavity (521). A filter screen (530) is also fixedly connected between the valve plate frame (520) and the packaging plate (540). The knife-shaped valve plate (510), the valve plate frame (520), the filter screen (530) and the packaging plate (540) are all made of polyethylene material.

2. The large-diameter gate valve according to claim 1, characterized in that: The clamping flange (2) and flange A (3) are fixedly connected to the valve body (5) via a connecting piece (6); the flange B (4) is fixedly connected to the valve body (5) via a connecting piece (6); the connecting piece (6) comprises bolt bodies (610) of several models, and nuts (620) matched with the bolt bodies (610); the bolt bodies (610) are divided into bolt A (611), bolt B (612), bolt C (613) and bolt D (614), all of which are suitable for matching with the nuts (620) of the same model.

3. The large-diameter gate valve according to claim 2, characterized in that: The flange A (3) and the flange B (4) both include a connecting plate (341), a plurality of second through holes (343) are provided on the connecting plate (341), one end of the connecting plate (341) has a fitting sleeve (342), and a rib plate (344) is provided between the outer side surface of the fitting sleeve (342) and the end surface of the connecting plate (341).

4. The large-diameter gate valve according to claim 3, characterized in that: The inner wall of the fitting sleeve (342) of the flange A (3) is smooth, and the end of the double-socket elbow (1) is provided with an embedded ring (102) suitable for being embedded in the fitting sleeve (342) of the flange A (3); one end of the clamping flange (2) is provided with a pipe sleeve (201) suitable for being sleeved outside the main body of the double-socket elbow (1), and a clamping ring (101) is further provided between the embedded ring (102) and the double-socket elbow (1), suitable for being clamped between the clamping flange (2) and the fitting sleeve (342) of the flange A (3).

5. The large-diameter gate valve according to claim 4, characterized in that: The packaging plate (540) is provided with a plurality of fifth through holes (542) in the portion outside the valve cavity (521), the valve plate frame (520) is provided with a third through hole (522) passing through both end surfaces, and the filter screen (530) is provided with a fourth through hole (531) passing through both end surfaces. The number and position of the third through hole (522) and the fourth through hole (531) correspond to those of the fifth through hole (542), and are suitable for the bolt body (610) to pass through.

6. The large-diameter gate valve according to claim 5, characterized in that: The bolt C (613) sequentially passes through the first through hole (202), the second through hole (343) on the flange A (3), the fifth through hole (542), the fourth through hole (531), the third through hole (522), the fifth through hole (542) on the other side and the second through hole (343) on the flange B (4), and then cooperates with the nut (620); the bolt D (614) sequentially passes through the second through hole (343) on the flange A (3), the fifth through hole (542), the fourth through hole (531), the third through hole (522), the fifth through hole (542) on the other side and the second through hole (343) on the flange B (4), and then cooperates with the nut (620).

7. The large-diameter gate valve according to claim 6, characterized in that: A plurality of blind holes (543) are provided on the outer side surfaces of the two packaging plates (540); the blind holes (543) and the fifth through holes (542) on a single packaging plate (540) correspond to the second through holes (343) on the flange A (3) or the flange B (4); and the blind holes (543) and the fifth through holes (542) on a single packaging plate (540) together form a ring.

8. The large-diameter gate valve according to claim 7, characterized in that: The bolt A (611) passes through the second through hole (343) on the flange A (3) and is threadedly connected to the blind hole (543); the bolt A (611) passes through the second through hole (343) on the flange B (4) and is threadedly connected to the blind hole (543) on another packaging plate (540); the bolt B (612) passes through the first through hole (202) and the second through hole (343) on the flange A (3) in sequence and is threadedly connected to the blind hole (543).

9. The large-diameter gate valve according to any one of claims 1 to 8, characterized in that: The inner wall of the fitting sleeve (342) of the flange B (4) is provided with an internal thread (401), one end of the main pipe body (7) is a fitting ring (701), and the outer side surface of the fitting ring (701) is provided with an external thread (702). After matching with the internal thread (401), the joint between the main pipe body (7) and the flange B (4) is welded.

10. The large-diameter gate valve according to claim 9, characterized in that: The upper end of the knife-shaped valve plate (510) is located outside the valve plate frame (520) and is provided with a force-applying groove (511).

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