Flat gate valve with shearing function

Abstract

The utility model discloses a flat gate valve with a shearing function, which comprises a valve body, an upper valve cover and a lower valve cover, the upper valve cover and the lower valve cover are respectively connected with the upper end and the lower end of the valve body through bolts, a first valve cavity is arranged between the valve body and the upper valve cover, a second valve cavity is arranged between the valve body and the lower valve cover, a circulation channel is arranged in the center of the valve body, and a gate plate is arranged in the valve body. The upper end of the gate plate is fixedly connected with a valve rod, the upper end of the valve rod penetrates out of the upper valve cover to be connected with a driving device, a circulation opening matched with the circulation channel is formed in the lower end of the gate plate, a valve seat is embedded into the inner wall of the valve body and abuts against the two sides of the gate plate, and a sealing structure is arranged in the second valve cavity and comprises a sealing plate. The sealing plates are located on the two sides of the gate plate. After the gate plate cuts off medium circulation, the interior of the valve cavity can still be kept clean and tidy, the frequency of manual cleaning is reduced, and the gate valve is more convenient to use.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, and more specifically to a gate valve with a shear plate. Background Art

[0002] The flat gate valve is a sliding valve with a parallel gate as the closing part. Its closing part can be a single gate or a double gate with a propping mechanism in between. The flat gate valve controls the valve stem to move up and down through the control drive device to realize the movement of the gate, thereby realizing the opening and closing of the gate valve.

[0003] The transportation of many media requires the installation of a shear-type flat gate valve, which cuts off the medium by moving the gate downward. The shear-type flat gate valve has the following problems: when the gate is closed, the flow port of the gate will move downward into the valve cavity, so the impurities in the flow port will be brought into the valve cavity and remain in the valve cavity. Therefore, it is necessary to manually disassemble the valve for cleaning, which is cumbersome and inconvenient to use. Therefore, the present application proposes a flat gate valve with cavity protection. Therefore, the present application proposes a flat gate valve with shearing. Utility Model Content

[0004] The utility model aims to provide a gate valve with a shear plate, which can still keep the valve cavity clean after the gate cuts off the flow of the medium, reduce the frequency of manual cleaning, and make the gate valve more convenient to use.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A gate valve with a shear plate, comprising a valve body and an upper valve cover and a lower valve cover respectively connected by bolts at the upper and lower ends of the valve body, a valve cavity 1 is provided between the valve body and the upper valve cover, a valve cavity 2 is provided between the valve body and the lower valve cover, a flow channel is provided at the center of the valve body, a gate is provided in the valve body, the upper end of the gate is fixedly connected to the valve stem, the upper end of the valve stem passes through the upper valve cover and is connected to a driving device, a flow port matching the flow channel is provided at the lower end of the gate, a valve seat is embedded in the inner wall of the valve body and abuts against both sides of the gate, a sealing structure is provided in the valve cavity 2, the sealing structure comprises a sealing plate, the sealing plate is located on both sides of the gate, the upper ends of the sealing plates are fixedly connected to the corresponding lower ends of the valve seats, a fixing plate is provided on a side of the sealing plate away from the gate plate, the upper end of the fixing plate is fixedly connected to the valve body, a plurality of through holes are provided on the fixing plate, an extrusion column is provided on a side of the through hole close to the gate plate, a moving column is fixedly provided at a section of the through hole away from the gate plate through a threaded connection, and a spring structure is clamped between the moving column and the extrusion column.

[0007] By adopting the above technical solution, the utility model has the following advantages:

[0008] The setting of the sealing plate of the utility model plays the role of sealing the two ends of the flow port, so that when the gate valve is closed, the medium in the flow port will not flow into the valve chamber two, which plays the role of keeping the valve chamber two clean and tidy, reduces the frequency of manual cleaning, and makes the gate valve more convenient to use; the setting of the spring structure and the extrusion column of the utility model enables the elastic force of the spring structure to squeeze the extrusion column toward the sealing plate, further strengthening the sealing performance between the sealing plate and the gate plate, and effectively preventing the medium from flowing out of the flow port; the setting of the movable column of the utility model can strengthen the elastic force of the spring structure by rotating inwards, thereby extending the service life of the spring structure, and can also be conveniently taken out of the spring structure for replacement by rotating outwards.

[0009] Furthermore, sliders are fixedly provided on both sides of one end of the extrusion column close to the spring structure, and sliding grooves are provided at both ends of the through hole, and the sliders are clamped in the corresponding sliding grooves.

[0010] By adopting the above technical solution, the utility model has the following advantages:

[0011] The arrangement of the slide block and the slide groove of the utility model can effectively prevent the extrusion column from being separated from the through hole.

[0012] Furthermore, the spring structure includes a main spring, and clamping plates are fixedly provided at both ends of the main spring, and the clamping plates are respectively abutted against the corresponding moving column and the extrusion column.

[0013] By adopting the above technical solution, the utility model has the following advantages:

[0014] The arrangement of the main spring and the clamping plate of the utility model enables the clamping plate on one side of the main spring to be squeezed by the moving column, and the clamping plate on the other side can generate a unidirectional squeezing force on the squeezing column.

[0015] Furthermore, a handle is fixedly provided at one end of the movable column away from the spring structure.

[0016] By adopting the above technical solution, the utility model has the following advantages:

[0017] The arrangement of the handle of the utility model facilitates the rotation of the movable column.

[0018] Furthermore, the valve seat is provided with a plurality of spring grooves at one end away from the gate plate, and a plurality of transverse springs are fixedly provided in the spring grooves. The valve seat is provided with inner ring grooves at the lower end of the spring grooves and on the outer side of the valve seat, and O-rings are clamped in the inner ring grooves.

[0019] By adopting the above technical solution, the utility model has the following advantages:

[0020] The provision of the transverse spring of the utility model plays the role of squeezing the valve seat toward the gate plate, thereby enhancing the sealing performance between the gate plate and the valve seat. The provision of the O-ring enhances the sealing performance between the valve seat and the valve body, both of which can effectively prevent medium leakage.

[0021] Furthermore, an annular sealing groove is provided on one side of the valve seat close to the gate plate, a secondary annular groove is provided on the upper end of the annular sealing groove, a sealing ring is clamped in the annular sealing groove, a secondary annular ring is fixed at the position of the sealing ring corresponding to the secondary annular groove, the secondary annular ring is clamped in the corresponding secondary annular groove, and one side of the secondary annular ring and the sealing ring are both in contact with one side of the gate plate.

[0022] By adopting the above technical solution, the utility model has the following advantages:

[0023] The provision of the sealing ring and the auxiliary ring of the utility model reduces the direct contact area between the valve seat and the gate plate, which can effectively prevent the valve seat and the gate plate from direct wear, thereby effectively extending the service life of the valve seat and the gate plate, and also improves the sealing performance between the valve seat and the gate plate.

[0024] Furthermore, a stuffing groove is provided on the inner side of the upper end of the upper valve cover, a vertical spring is provided in the center of the stuffing groove, abutment plates are fixedly provided at both upper and lower ends of the vertical spring, a sealing stuffing is provided at the end of the abutment plate away from the vertical spring, U-shaped rings are provided at both upper and lower ends of the stuffing groove, a stuffing cover plate is clamped at the upper end of the stuffing groove, and the stuffing cover plate is fixedly connected to the upper valve cover by bolts.

[0025] By adopting the above technical solution, the utility model has the following advantages:

[0026] The arrangement of the vertical spring and the abutment plate of the utility model can effectively squeeze the sealing packing toward the upper and lower ends, thereby enhancing the contact strength between the sealing packing and the valve stem and the upper valve cover, thereby enhancing the sealing performance between the valve stem and the upper valve cover. The U-shaped ring also further squeezes the sealing packing, thereby improving the sealing performance between the valve stem and the upper valve cover and effectively preventing medium leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0028] Figure 1 It is a schematic diagram of the structure of the utility model;

[0029] Figure 2 This is a schematic diagram of the cross-sectional structure at the center of the utility model;

[0030] Figure 3 For this utility model Figure 2 The enlarged structural diagram at A in the middle;

[0031] Figure 4 For this utility model Figure 2 The enlarged structural diagram at B in the middle;

[0032] Figure 5 For this utility model Figure 2 Enlarged structural diagram at point C in the middle.

[0033] 1. Valve body; 101. Circulation channel; 2. Upper valve cover; 201. Packing groove; 3. Vertical spring; 301. Abutment plate; 4. Fixed plate; 401. Through hole; 402. Slide groove; 5. Main spring; 501. Card; 6. Moving column; 601. Handle; 7. Extrusion column; 701. Slider; 8. Gate; 801. Circulation port; 9. Valve seat; 901. Annular sealing groove; 902. Auxiliary ring groove; 903. Spring groove; 904. Inner ring groove; 10. Driving device; 11. Valve cavity two; 12. Valve cavity one; 13. Valve stem; 14. U-shaped ring; 15. Packing cover plate; 16. Sealing packing; 17. Lower valve cover; 18. O-ring; 19. Transverse spring; 20. Auxiliary ring; 21. Sealing ring; 22. Sealing plate. DETAILED DESCRIPTION

[0034] like Figures 1 to 3 As shown, in the specific embodiment, a gate valve with a shear plate includes a valve body 1 and an upper valve cover 2 and a lower valve cover 17 connected by bolts at the upper and lower ends of the valve body 1, a valve cavity 12 is provided between the valve body 1 and the upper valve cover 2, a valve cavity 2 11 is provided between the valve body 1 and the lower valve cover 17, a flow channel 101 is provided at the center of the valve body 1, a gate plate 8 is provided in the valve body 1, the upper end of the gate plate 8 is fixedly connected to the valve stem 13, the upper end of the valve stem 13 passes through the upper valve cover 2 and is connected to the driving device 10, the lower end of the gate plate 8 is provided with a flow port 801 matching the flow channel 101, and the valve seat 9 is embedded in the valve body 1. The inner wall abuts against both sides of the gate plate 8, and a sealing structure is provided in the valve chamber 11, which includes a sealing plate 22. The sealing plates 22 are located on both sides of the gate plate 8. The upper ends of the sealing plates 22 are fixedly connected to the lower ends of the corresponding valve seats 9. A fixed plate 4 is provided on the side of the sealing plate 22 away from the gate plate 8. The upper end of the fixed plate 4 is fixedly connected to the valve body 1. A plurality of through holes 401 are provided on the fixed plate 4. An extrusion column 7 is provided on the side of the through hole 401 close to the gate plate 8. A movable column 6 is fixedly provided at a section of the through hole 401 away from the gate plate 8 through a threaded connection, and a spring structure is clamped between the movable column 6 and the extrusion column 7.

[0035] Through the above settings, the setting of the sealing plate 22 of the utility model plays the role of sealing the two ends of the flow port 801, so that when the gate valve is closed, the medium in the flow port 801 will not flow into the valve chamber 11, which plays the role of keeping the valve chamber 11 clean and tidy, reducing the frequency of manual cleaning, and making the gate valve more convenient to use; the setting of the spring structure and the extrusion column 7 of the utility model enables the elastic force of the spring structure to squeeze the extrusion column 7 toward the sealing plate 22, further strengthening the sealing performance between the sealing plate 22 and the gate plate 8, and effectively preventing the medium from flowing out of the flow port 801; the setting of the movable column 6 of the utility model can strengthen the elastic force of the spring structure by rotating inward, thereby extending the service life of the spring structure, and can also be conveniently taken out of the spring structure for replacement by rotating outward.

[0036] like Figures 2 to 3 As shown, sliders 701 are fixed on both sides of one end of the extrusion column 7 close to the spring structure, and sliding grooves 402 are provided at both ends of the through hole 401, and the sliders 701 are clamped in the corresponding sliding grooves 402; the spring structure includes a main spring 5, and clamping plates 501 are fixed at both ends of the main spring 5, and the clamping plates 501 are respectively abutted against the corresponding moving column 6 and the extrusion column 7; a handle 601 is fixed on the end of the moving column 6 away from the spring structure.

[0037] Through the above settings, the settings of the slider 701 and the slide groove 402 of the utility model can effectively prevent the extrusion column 7 from escaping from the through hole 401; the settings of the main spring 5 and the card plate 501 of the utility model make the card plate 501 on one side of the main spring 5 squeezed by the movable column 6, and the card plate 501 on the other side can generate a unidirectional squeezing force on the extrusion column 7; the setting of the handle 601 of the utility model facilitates the rotation of the movable column 6.

[0038] like Figures 4 to 5 As shown, the end of the valve seat 9 away from the gate plate 8 is provided with a plurality of spring grooves 903, in which a plurality of transverse springs 19 are fixedly arranged, the valve seat 9 is provided with inner ring grooves 904 at the lower end of the spring grooves 903 and the outer side of the valve seat 9, in which O-type sealing rings 18 are clamped; the side of the valve seat 9 close to the gate plate 8 is provided with an annular sealing groove 901, the upper end of the annular sealing groove 901 is communicated with a secondary ring groove 902, a sealing ring 21 is clamped in the annular sealing groove 901, and a secondary ring 21 is fixedly arranged at the position of the sealing ring 21 corresponding to the secondary ring groove 902 0, the secondary ring 20 is clamped in the corresponding secondary ring groove 902, and one side of the secondary ring 20 and the sealing ring 21 are both in contact with one side of the gate 8; a packing groove 201 is provided on the inner side of the upper end of the upper valve cover 2, and a vertical spring 3 is provided in the center of the packing groove 201, and abutment plates 301 are fixedly provided at both ends of the vertical spring 3, and a sealing packing 16 is provided at one end of the abutment plate 301 away from the vertical spring 3, and U-shaped rings 14 are provided at both ends of the packing groove 201, and a packing cover plate 15 is clamped at the upper end of the packing groove 201, and the packing cover plate 15 is fixedly connected to the upper valve cover 2 by bolts.

[0039] Through the above arrangement, the arrangement of the transverse spring 19 of the utility model plays the role of squeezing the valve seat 9 toward the gate plate 8, thereby strengthening the sealing performance between the gate plate 8 and the valve seat 9, and the arrangement of the O-ring 18 strengthens the sealing performance between the valve seat 9 and the valve body 1, both of which can effectively prevent medium leakage; the arrangement of the sealing ring 21 and the auxiliary ring 20 of the utility model reduces the direct contact area between the valve seat 9 and the gate plate 8, which can effectively prevent the direct wear of the valve seat 9 and the gate plate 8, thereby effectively extending the service life of the valve seat 9 and the gate plate 8, and in addition, also increases the sealing performance between the valve seat 9 and the gate plate 8; the arrangement of the vertical spring 3 and the abutment plate 301 of the utility model can effectively squeeze the sealing packing 16 toward the upper and lower ends, thereby strengthening the contact strength between the sealing packing 16 and the valve stem 13 and the upper valve cover 2, thereby strengthening the sealing performance between the valve stem 13 and the upper valve cover 2, and the U-shaped ring 14 further squeezes the sealing packing 16, improves the sealing performance between the valve stem 13 and the upper valve cover 2, and can effectively prevent medium leakage.

[0040] Working principle: When using the gate valve, the valve stem can be controlled to move up through the driving device to drive the gate plate to move up, so that the flow port corresponds to the flow channel and the flow of the medium is realized. The transverse spring can squeeze the valve seat toward the gate plate, and then cooperate with the setting of the auxiliary ring, sealing ring and O-ring to effectively increase the sealing between the gate plate and the valve seat, which can effectively prevent the medium from leaking into the valve cavity one and the valve cavity two, thereby keeping the interior clean and tidy and reducing the number of manual cleaning times. When closing the gate valve, it is only necessary to control the gate plate to move down so that the gate plate shears the medium so that the flow port does not correspond to the flow channel. At this time, part of the medium in the flow port is brought into the valve cavity two. Due to the closeness of the sealing plate and the gate plate The fit prevents the medium from leaving the flow port, and therefore cannot enter the valve chamber two, thereby keeping the valve chamber two clean. The arrangement of the extrusion column and the main spring allows the extrusion column to squeeze the sealing plate to further fit with the gate plate to achieve effective sealing. When the main spring is prone to deterioration in elasticity after long-term use, the main spring can be further compressed by rotating the moving column inward to restore its elasticity, thereby extending the service life of the main spring. When replacement is needed, only the moving column needs to be unscrewed. Maintenance and replacement are very convenient, and the gate valve as a whole is also very convenient to use. The connection method between the drive device of the utility model and the valve stem and other structures, as well as its operating principle are all disclosed in the prior art, so they will not be described in detail.

[0041] The above are only preferred implementations of the utility model. The protection scope of the utility model is not limited to the above embodiments. All technical solutions under the idea of ​​the utility model belong to the protection scope of the utility model. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the utility model should also be regarded as the protection scope of the utility model.

Claims

1. A gate valve with a shear plate, comprising a valve body (1) and an upper valve cover (2) and a lower valve cover (17) connected at the upper and lower ends of the valve body (1) by bolts, a valve cavity (12) is provided between the valve body (1) and the upper valve cover (2), a valve cavity (11) is provided between the valve body (1) and the lower valve cover (17), a flow channel (101) is provided at the center of the valve body (1), a gate plate (8) is provided in the valve body (1), the upper end of the gate plate (8) is fixedly connected to a valve stem (13), the upper end of the valve stem (13) passes through the upper valve cover (2) and is connected to a driving device (10), characterized in that: The lower end of the gate plate (8) is provided with a flow port (801) matching the flow channel (101); the valve seat (9) is embedded in the inner wall of the valve body (1) and abuts against both sides of the gate plate (8); a sealing structure is provided in the second valve chamber (11); the sealing structure comprises a sealing plate (22); the sealing plate (22) is located on both sides of the gate plate (8); the upper ends of the sealing plates (22) are fixedly connected to the corresponding lower ends of the valve seats (9); a fixing plate (4) is provided on the side of the sealing plate (22) away from the gate plate (8); the upper end of the fixing plate (4) is fixedly connected to the valve body (1); a plurality of through holes (401) are provided on the fixing plate (4); a squeezing column (7) is provided on the side of the through hole (401) close to the gate plate (8); a moving column (6) is fixedly provided at a section of the through hole (401) away from the gate plate (8) through a threaded connection; a spring structure is clamped between the moving column (6) and the squeezing column (7).

2. A gate valve with shear plate according to claim 1, characterized in that: Slide blocks (701) are fixedly provided on both sides of one end of the extrusion column (7) close to the spring structure, and slide grooves (402) are provided at both ends of the through hole (401), and the slide blocks (701) are clamped in the corresponding slide grooves (402).

3. A gate valve with shear plate according to claim 2, characterized in that: The spring structure comprises a main spring (5), and clamping plates (501) are fixedly provided at both ends of the main spring (5), and the clamping plates (501) are respectively abutted against the corresponding moving column (6) and the extrusion column (7).

4. A gate valve with shear plate according to claim 3, characterized in that: A handle (601) is fixedly provided at one end of the movable column (6) away from the spring structure.

5. A gate valve with shear plate according to claim 1, characterized in that: The valve seat (9) is provided with a plurality of spring grooves (903) at one end away from the gate plate (8), and a plurality of transverse springs (19) are fixedly provided in the spring grooves (903). The valve seat (9) is provided with inner ring grooves (904) at the lower end of the spring grooves (903) and on the outer side of the valve seat (9), and an O-ring (18) is clamped in the inner ring grooves (904).

6. A gate valve with shear plate according to claim 5, characterized in that: The valve seat (9) is provided with an annular sealing groove (901) on one side close to the gate plate (8), and a secondary annular groove (902) is provided at the upper end of the annular sealing groove (901). A sealing ring (21) is clamped in the annular sealing groove (901), and a secondary annular ring (20) is fixedly provided at a position of the sealing ring (21) corresponding to the secondary annular groove (902). The secondary annular ring (20) is clamped in the corresponding secondary annular groove (902), and one side of the secondary annular ring (20) and the sealing ring (21) are both in contact with one side of the gate plate (8).

7. A gate valve with shear plate according to claim 1, characterized in that: A stuffing groove (201) is provided on the inner side of the upper end of the upper valve cover (2), a vertical spring (3) is provided in the center of the stuffing groove (201), abutment plates (301) are fixedly provided at both the upper and lower ends of the vertical spring (3), a sealing stuffing (16) is provided at one end of the abutment plate (301) away from the vertical spring (3), U-shaped rings (14) are provided at both the upper and lower ends of the stuffing groove (201), a stuffing cover plate (15) is clamped at the upper end of the stuffing groove (201), and the stuffing cover plate (15) is fixedly connected to the upper valve cover (2) by bolts.

Images