Pipeline valve group

Abstract

A pipeline valve set comprises a medium conveying pipeline (200), a medium storage tank (201), a check valve (202) and a gate valve (203), the medium conveying pipeline (200) is communicated with the inlet end of the medium storage tank (201), the check valve (202) and the gate valve (203) are installed on the medium conveying pipeline (200), and the check valve (202) is close to the inlet end of the medium storage tank (201); the gate valve has the advantages that the packing seal of the gate valve is tightly pressed and is not easy to loosen, the service life of the valve rod nut is long, and lubricating oil can be added as required.

Description

Technical Field

[0001] The utility model relates to the field of valve equipment, and particularly relates to a pipeline valve group. Background Art

[0002] At present, in the fluid conveying pipeline of a factory, it is necessary to convey a fluid medium to a storage tank through a pipeline.

[0003] The gate valve is an important control component in the fluid transportation system and has the function of opening and closing the flow of the medium in the pipeline. During the opening and closing process of the gate valve, the gap between the outer wall of the valve stem and the inner wall of the valve cover needs to be sealed by packing seal. The packing seal needs to be tightened by a packing gland. There is a lack of positioning on the contact surface between the existing packing gland and the gland ring, resulting in easy loosening and affecting the sealing effect. The existing valve stem nut is prone to difficult screwing after long-term use. There is a lack of a wedge gate valve with a long service life and the ability to add lubricating oil.

[0004] The check valve is a valve that automatically opens and closes depending on the flow of the medium itself and is often used to prevent the reverse flow of the medium. When the valve disc of the existing swing check valve opens during use, the end of the valve disc impacts on the valve body, resulting in a relatively large impact sound and affecting the service life of the valve body. There is a lack of a check valve with a valve disc opening buffer function. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a pipeline valve group aiming at the above deficiencies.

[0006] The utility model includes a medium conveying pipeline, a medium storage tank, a check valve and a gate valve.

[0007] The medium conveying pipeline is connected to the inlet end of the medium storage tank. The check valve and the gate valve are respectively installed on the medium conveying pipeline, and the check valve is close to the inlet end of the medium storage tank.

[0008] The gate valve includes a valve body, a valve cover, a valve stem and a packing pressing plate.

[0009] The valve cover is installed on the top of the valve body. A valve plate is arranged at the bottom of the valve stem. The valve stem is installed in the valve cover through a packing seal ring. The valve plate is located inside the valve body. A packing sleeve is arranged at the top of the packing seal ring. A gland ring is arranged at the upper part of the packing sleeve. The top of the gland ring is an arc-shaped protrusion. A through hole is opened in the middle of the packing pressing plate. The valve stem is located in the through hole. An arc-shaped groove matching the arc-shaped protrusion is opened at the bottom of the through hole of the packing pressing plate. The packing pressing plate presses on the gland ring and is fixed on the top of the valve cover through a pair of bolts. Rotating the valve stem drives the valve plate to rise or fall.

[0010] The check valve includes a check valve body, a check valve seat and a check valve flap. A valve seat mounting groove is formed on the inner wall of one side of the check valve body near the inlet end. The check valve seat is mounted in the valve seat mounting groove. The check valve flap is movably mounted on the inner wall of the check valve body through a rocker arm. A limiting protrusion is provided on the upper inner wall of the check valve body. An elastic buffer piece is provided on the rocker arm. The elastic buffer piece is mounted on the rocker arm through a set of springs. The check valve flap rotates and opens under the impact of the fluid medium, and the elastic buffer piece abuts against the limiting protrusion.

[0011] A nut support is provided on the top of the valve cover. A nut mounting groove is formed on the top of the nut support. The valve stem nut is movably mounted in the nut mounting groove through a bearing. An external thread is provided on the outer wall of the upper part of the valve stem. The upper part of the valve stem is threadedly mounted in the valve stem nut. A handwheel is provided on the upper part of the valve stem nut. Rotating the handwheel drives the valve stem nut to rotate in the nut mounting groove, and the valve stem nut drives the valve stem to rise or fall; the nut support is detachably mounted on the top of the valve cover through bolts; a support ring is provided on the valve stem nut. Centripetal thrust bearings are respectively provided on the top and bottom of the support ring. The valve stem nut is movably mounted in the nut mounting groove through the centripetal thrust bearings, and the upper centripetal thrust bearing is pressed by a bearing gland.

[0012] A lubricating oil filling port is formed on the inner wall of the nut mounting groove, and a plug is provided on the lubricating oil filling port.

[0013] A pair of guiding protrusions are symmetrically distributed on the inner wall of the valve body, and guiding grooves matched with the guiding protrusions are respectively provided on both sides of the valve plate.

[0014] A sewage discharge pipe is provided on the valve body below the valve plate, and a stop valve is provided on the sewage discharge pipe.

[0015] Internal threads are provided on the inner wall of the valve seat mounting groove, and external threads are provided on the outer wall of the check valve seat. The check valve seat is threadedly mounted in the valve seat mounting groove; the check valve seat is annular, and a pair of knob grooves are provided on the inner wall of the check valve seat.

[0016] A rocker arm mounting seat is provided on the upper inner wall of the check valve body. An ear seat is provided on the rocker arm mounting seat. The rocker arm is movably mounted on the ear seat through a pin shaft; the ear seat is detachably mounted on the rocker arm mounting seat through bolts.

[0017] The bottom of the limiting protrusion is beveled.

[0018] Flange plates are respectively provided at the inlet end and the outlet end of the check valve body, and annular sealing beveled openings are provided on the flange plates.

[0019] A valve flap mounting hole is formed on the rocker arm. A positioning protrusion is provided in the middle of the check valve flap. A threaded hole is formed on the positioning protrusion. The positioning protrusion is located in the valve flap mounting hole. A locking screw is screwed into the threaded hole, and the check valve flap is pressed against the rocker arm through the nut of the locking screw; a valve cover is provided on the top of the check valve body.

[0020] The advantages of the present utility model are as follows: The packing seal of the gate valve is tightly pressed and not prone to loosening. The service life of the valve stem nut is long, and lubricating oil can be added as needed.

[0021] When the valve flap of the check valve opens, the collision noise is small, which extends the service life of the valve. The valve seat is installed in a detachable manner, making it convenient for maintenance when the seal is not tight. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic structural diagram of the present utility model.

[0023] Figure 2 It is a schematic sectional view of the gate valve of the present utility model.

[0024] Figure 3 It is a schematic structural diagram of the packing seal ring of the gate valve of the present utility model.

[0025] Figure 4 It is a schematic structural diagram of the valve stem nut of the gate valve of the present utility model.

[0026] Figure 5 It is a schematic structural diagram when the valve flap of the check valve of the present utility model opens.

[0027] Figure 6 It is the present utility model Figure 5 of the partial enlarged schematic structural diagram.

[0028] Figure 7 It is a schematic structural diagram when the valve flap of the check valve of the present utility model closes. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Usually, the components of the embodiments of the present invention described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0030] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed present invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0031] It should be noted that: Similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0032] In the description of the embodiments of the present invention, it should be noted that if terms such as "upper", "lower", "inner", "outer", etc. are used to indicate the orientation or positional relationship, it is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the invention product is usually placed during use. This is only for the convenience of describing the present invention 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 therefore should not be construed as a limitation on the present invention. In addition, in the description of the present invention, if terms such as "first", "second", etc. are used only for distinguishing descriptions, they cannot be understood as indicating or implying relative importance.

[0033] In the description of the embodiments of the present invention, it should also be noted that unless otherwise clearly specified and limited, if terms such as "installation" and "connection" are used, they should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0034] As shown in the drawings, the utility model includes a medium delivery pipeline 200, a medium storage tank 201, a check valve 202, and a gate valve 203.

[0035] The medium delivery pipeline 200 is communicated with the inlet end of the medium storage tank 201. The check valve 202 and the gate valve 203 are respectively installed on the medium delivery pipeline 200, and the check valve 202 is close to the inlet end of the medium storage tank 201.

[0036] The gate valve 203 includes a valve body 1, a valve cover 2, a valve stem 3, and a packing gland 4.

[0037] The valve cover 2 is installed on the top of the valve body 1. The bottom of the valve stem 3 is provided with a valve plate 5. The valve stem 3 is installed in the valve cover 2 through a packing seal ring 6. The valve plate 5 is located inside the valve body 1. The top of the packing seal ring 6 is provided with a packing sleeve 7. The upper part of the packing sleeve 7 is provided with a pressure ring 8. The top of the pressure ring 8 is an arc-shaped protrusion. A through hole is opened in the middle of the packing gland 4, and the valve stem 3 is located in the through hole. An arc-shaped groove matching the arc-shaped protrusion is opened at the bottom of the through hole of the packing gland 4. The packing gland 4 presses on the pressure ring 8 and is fixed to the top of the valve cover 2 by a pair of bolts. Rotating the valve stem 3 drives the valve plate 5 to rise or fall.

[0038] The check valve 202 includes a check valve body 101, a check valve seat 102 and a check valve flap 103. A valve seat installation groove is formed on the inner wall of one side of the check valve body 101 near the inlet end. The check valve seat 102 is installed in the valve seat installation groove. The check valve flap 103 is movably installed on the inner wall of the check valve body 101 through a rocker arm 104. A limiting protrusion 105 is provided on the upper inner wall of the check valve body 101. An elastic buffer sheet 106 is provided on the rocker arm 104. The elastic buffer sheet 106 is installed on the rocker arm 104 through a set of springs 107. The check valve flap 103 rotates and opens under the impact of the fluid medium, and the elastic buffer sheet 106 abuts against the limiting protrusion 105.

[0039] A nut bracket 9 is provided at the top of the valve cover 2. A nut installation groove is formed at the top of the nut bracket 9. The valve stem nut 10 is movably installed in the nut installation groove through a bearing. An external thread is provided on the outer wall of the upper part of the valve stem 3. The upper part of the valve stem 3 is threadedly installed in the valve stem nut 10. A handwheel 11 is provided at the upper part of the valve stem nut 10. Rotating the handwheel 11 drives the valve stem nut 10 to rotate in the nut installation groove, and the valve stem nut 10 drives the valve stem 3 to rise or fall; the nut bracket 9 is detachably installed at the top of the valve cover 2 through bolts; a support ring is provided on the valve stem nut 10, and centripetal thrust bearings 12 are respectively provided at the top and bottom of the support ring. The valve stem nut 10 is movably installed in the nut installation groove through the centripetal thrust bearings 12, and the upper centripetal thrust bearing 12 is pressed by a bearing gland 13.

[0040] A lubricating oil filling port is formed on the inner wall of the nut installation groove, and a plug 14 is provided on the lubricating oil filling port.

[0041] A pair of guiding protrusions are symmetrically distributed on the inner wall of the valve body 1, and guiding grooves matched with the guiding protrusions are respectively provided on both sides of the valve plate 5.

[0042] A sewage discharge pipe is provided on the valve body 1 below the valve plate 5, and a stop valve is provided on the sewage discharge pipe.

[0043] Internal threads are provided on the inner wall of the valve seat installation groove, and external threads are provided on the outer wall of the check valve seat 102. The check valve seat 102 is threadedly installed in the valve seat installation groove; the check valve seat 102 is annular, and a pair of knob grooves 108 are provided on the inner wall of the check valve seat 102.

[0044] A rocker arm mounting seat is provided on the upper inner wall of the check valve body 101, and an ear seat is provided on the rocker arm mounting seat. The rocker arm 104 is movably installed on the ear seat through a pin shaft; the ear seat is detachably installed on the rocker arm mounting seat through bolts.

[0045] The bottom of the limiting protrusion 105 is a slope.

[0046] Flange plates are respectively provided at the inlet end and the outlet end of the check valve body 101, and annular sealing bevels 109 are provided on the flange plates.

[0047] The rocker arm 104 is provided with a valve flap mounting hole. A positioning protrusion 110 is arranged in the middle of the check valve flap 103. A threaded hole is opened on the positioning protrusion 110. The positioning protrusion 110 is located in the valve flap mounting hole. The locking screw is screwed into the threaded hole, and the check valve flap 103 is pressed against the rocker arm 104 through the nut of the locking screw; a valve cover is arranged at the top of the check valve body 101.

[0048] Example 1: The medium in the factory is transported to the medium storage tank 201 through the medium conveying pipeline 200. The medium conveying pipeline 200 is opened or closed through the gate valve 203, and the check valve 202 is used to prevent the medium in the medium storage tank 201 from flowing back.

[0049] When opening the gate valve, rotate the handwheel 11 forward. The handwheel 11 drives the valve stem nut 10 to rotate. The valve stem nut 10 is supported by a pair of angular contact thrust bearings 12, so that the valve stem nut 10 can rotate smoothly between the bearing gland 13 and the inner bottom surface of the nut installation groove. When the valve stem nut 10 rotates, it drives the valve stem 3 to move upward through the thread matching, so that the valve plate 5 rises, and the inner cavity of the valve body 1 is connected. When closing the valve, rotate the handwheel 11 backward. The handwheel 11 drives the valve stem nut 10 to rotate. When the valve stem nut 10 rotates, it drives the valve stem 3 to move downward through the thread matching, so that the valve plate 5 descends, and the inner cavity of the valve body 1 is closed. When the packing gland 4 presses the packing ring 8, the arc-shaped protrusion of the packing ring 8 is located in the arc-shaped groove of the packing gland 4, making the packing gland 4 more accurate when being pressed and not easy to loosen.

[0050] When the fluid medium flows from the inlet end to the outlet end of the check valve body 101, under the impact of the fluid medium, the check valve flap 103 rotates around the pin shaft and opens upward. When the fluid medium flows from the outlet end to the inlet end of the check valve body 101, the check valve flap 103 closes under the action of gravity, forms a seal with the end face of the check valve seat 102, and prevents the fluid medium from flowing back. When the check valve flap 103 opens, the elastic buffer piece 106 contacts the bottom slope of the limit protrusion 105, and the collision noise is reduced under the elastic force of the spring 107. When installing the check valve seat 102, a special tool is inserted into the check valve seat 102. The special tool is provided with a knob protrusion that matches the knob groove 108. The knob protrusion drives the check valve seat 102 to rotate and is screwed into the valve seat installation groove. When the check valve body 101 is connected to the pipeline, a ring groove that matches the annular sealing bevel 109 is arranged at the pipeline port to form a wedge-shaped sealing surface, and then it is connected through a flange to make the sealing performance better.

Claims

1. A pipeline valve group, characterized in that It comprises a medium delivery pipeline (200), a medium storage tank (201), a check valve (202) and a gate valve (203). The medium delivery pipeline (200) is connected to the inlet end of the medium storage tank (201), and the check valve (202) and the gate valve (203) are respectively installed on the medium delivery pipeline (200), and the check valve (202) is close to the inlet end of the medium storage tank (201); The gate valve (203) comprises a valve body (1), a valve cover (2), a valve stem (3) and a packing pressure plate (4). The valve cover (2) is installed on the top of the valve body (1), and a valve plate (5) is arranged at the bottom of the valve stem (3). The valve stem (3) is installed in the valve cover (2) through a packing seal ring (6). The valve plate (5) is located in the valve body (1). A packing gland (7) is arranged on the top of the packing seal ring (6). A pressure ring (8) is arranged on the upper part of the packing gland (7). The top of the pressure ring (8) is an arc-shaped protrusion. A through hole is opened in the middle of the packing gland (4). The valve stem (3) is located in the through hole. An arc-shaped groove matching the arc-shaped protrusion is opened at the bottom of the through hole of the packing gland (4). The packing gland (4) is pressed on the pressure ring (8) and is fixed to the top of the valve cover (2) by a pair of bolts. The valve stem (3) is rotated to drive the valve plate (5) to rise or fall. The check valve (202) comprises a check valve body (101), a check valve seat (102) and a check valve flap (103). A valve seat installation groove is provided on the inner wall of the check valve body (101) on the side close to the inlet end. The check valve seat (102) is installed in the valve seat installation groove. The check valve flap (103) is movably installed on the inner wall of the check valve body (101) via a rocker arm (104). A limiting protrusion (105) is provided on the upper inner wall of the check valve body (101). An elastic buffer sheet (106) is provided on the rocker arm (104). The elastic buffer sheet (106) is installed on the rocker arm (104) via a group of springs (107). The check valve flap (103) rotates to open under the impact of a fluid medium, and the elastic buffer sheet (106) abuts against the limiting protrusion (105).

2. A pipeline valve assembly according to claim 1, characterized in that: A nut bracket (9) is arranged on the top of the valve cover (2). A nut mounting groove is formed on the top of the nut bracket (9). The valve stem nut (10) is movably mounted in the nut mounting groove via a bearing. An external thread is arranged on the upper outer wall of the valve stem (3). The upper thread of the valve stem (3) is mounted in the valve stem nut (10). A hand wheel (11) is arranged on the upper part of the valve stem nut (10). The hand wheel (11) is turned to drive the valve stem nut (10) to rotate in the nut mounting groove. The valve stem nut (10) drives the valve stem (3) to rise or fall. The nut bracket (9) is detachably mounted on the top of the valve cover (2) via bolts. A support ring is arranged on the valve stem nut (10). A radial thrust bearing (12) is respectively arranged on the top and bottom of the support ring. The valve stem nut (10) is movably mounted in the nut mounting groove via the radial thrust bearing (12). The radial thrust bearing (12) on the upper part is pressed tightly via a bearing pressure cover (13).

3. A pipeline valve assembly according to claim 2, characterized in that: A lubricating oil inlet is provided on the inner wall of the nut installation groove, and a plug (14) is provided on the lubricating oil inlet.

4. A pipeline valve assembly according to claim 1, characterized in that: A pair of guide protrusions are arranged on the inner wall of the valve body (1) in a mirror-image distribution, and guide grooves matching the guide protrusions are respectively arranged on both sides of the valve plate (5).

5. A pipeline valve assembly according to claim 1, characterized in that: A sewage discharge pipe is arranged on the valve body (1) below the valve plate (5), and a stop valve is arranged on the sewage discharge pipe.

6. A pipeline valve assembly according to claim 1, characterized in that: An internal thread is arranged on the inner wall of the valve seat installation groove, an external thread is arranged on the outer wall of the check valve seat (102), and the check valve seat (102) is threadedly installed in the valve seat installation groove; the check valve seat (102) is annular, and a pair of knob grooves (108) are arranged on the inner wall of the check valve seat (102).

7. A pipeline valve assembly according to claim 1, characterized in that: A rocker arm mounting seat is arranged on the inner wall of the upper part of the check valve body (101), and an ear seat is arranged on the rocker arm mounting seat. The rocker arm (104) is movably mounted on the ear seat through a pin shaft; and the ear seat is detachably mounted on the rocker arm mounting seat through bolts.

8. The pipeline valve assembly according to claim 1, characterized in that: The bottom of the limiting protrusion (105) is an inclined surface.

9. A pipeline valve assembly according to claim 1, characterized in that: The inlet end and the outlet end of the check valve body (101) are respectively provided with flanges, and the flanges are provided with an annular sealing bevel (109).

10. The pipeline valve assembly according to claim 1, characterized in that: A valve disc mounting hole is formed on the rocker arm (104); a positioning protrusion (110) is formed in the middle of the check valve disc (103); a threaded hole is formed on the positioning protrusion (110); the positioning protrusion (110) is located in the valve disc mounting hole; a locking screw is screwed into the threaded hole; the check valve disc (103) is pressed against the rocker arm (104) by a nut of the locking screw; and a valve cover is formed on the top of the check valve body (101).

Images