Liquid medium pipeline valve combination system

Abstract

A liquid medium pipeline valve combination system comprises a medium conveying pipeline (200), a medium storage tank (201), a check valve (202) and a stop 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 stop 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 valve has the advantages that gas in the inflation rubber ring is reduced along with temperature reduction, space is reserved, and the valve is prevented from being broken after water in the valve is frozen. The sealing performance of the valve clack and the valve seat is good.

Description

Technical Field

[0001] The utility model relates to the field of valves, and particularly relates to a combined valve system for liquid medium pipelines. Background Art

[0002] At present, in the fluid conveying pipelines of factories, it is necessary to convey fluid media to a storage tank through pipelines.

[0003] Globe valves are ubiquitous in daily production and life. All water pipelines cannot do without the control of various valves, which brings great convenience to people's production and life. A general globe valve is mainly composed of a valve body and a valve core. People control the flow of water through the opening and closing of the valve core. However, when people use valves in winter, if the pipeline and valve insulation measures are not good, the valve is often burst due to cold climate, solidification and expansion of the pipeline water. Moreover, this phenomenon is very common, resulting in valve scrapping, economic losses, loss of water control, a large amount of leakage, affecting normal production and life, and even causing floods, threatening people's lives and property safety.

[0004] A 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 medium from flowing back. When the valve disc of an 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, affecting the service life of the valve body. There is a lack of a check valve with a valve disc opening buffering function. Content of the Utility Model

[0005] The purpose of the utility model is to provide a combined valve system for liquid medium pipelines aiming at the above deficiencies.

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

[0007] The medium conveying pipeline is communicated with the inlet end of the medium storage tank. The check valve and the globe 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 globe valve includes a valve body, a valve seat, a valve rod and a group of inflatable rubber rings.

[0009] The valve seat is installed on the inner wall of the middle flow cavity of the valve body. The bottom of the valve rod is provided with a valve disc. The valve rod is movably and sealedly installed in the valve body. By rotating the valve rod, the valve disc is driven to rise or fall in the valve body. When the valve disc descends, it presses tightly on the top of the valve seat to close the middle flow cavity. Rubber ring installation grooves are respectively arranged on the inner walls of the inlet pipeline and the outlet pipeline of the valve body, and a group of inflatable rubber rings are installed in the corresponding rubber ring installation grooves.

[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 close to the inlet end. The check valve seat is installed in the valve seat mounting groove. The check valve flap is movably installed on the inner wall of the check valve body through a rocker arm. A limit 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 installed 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 limit protrusion.

[0011] Internal threads are provided on the inner wall of the flow-through cavity in the middle of the valve body. External threads are provided on the outer wall of the valve seat. The valve seat is threadedly installed on the inner wall of the flow-through cavity in the middle of the valve body. An annular inclined sealing surface is formed on the inner wall of the top of the valve seat. An annular inclined sealing protrusion matching the annular inclined sealing surface is provided on the lower outer wall of the valve flap. One side of the rubber ring mounting groove is the open end of the valve body, and the other side is the inner cavity of the valve body. The inner wall diameter of the valve body on one side of the rubber ring mounting groove is greater than the inner wall diameter of the valve body on the other side of the rubber ring mounting groove.

[0012] After the inflatable rubber ring is inflated and expanded, the inner ring cross-section of the inflatable rubber ring is arc-shaped, and the outer ring cross-section of the inflatable rubber ring is rectangular. An air nozzle mounting groove is provided on the outer ring of the inflatable rubber ring, and an inflatable nozzle is provided in the air nozzle mounting groove.

[0013] A valve cover is provided on the top of the valve body. The valve stem is movably and sealingly installed in the valve cover through packing sealing. The bottom of the valve stem is located inside the valve body. A rubber ring mounting groove is provided in the opening at the top of the valve body, and an inflatable rubber ring is provided in the rubber ring mounting groove.

[0014] Internal threads are provided on the inner wall of the valve seat mounting groove. External threads are provided on the outer wall of the check valve seat. The check valve seat is threadedly installed 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.

[0015] 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 installed on the ear seat through a pin shaft. The ear seat is detachably installed on the rocker arm mounting seat through a bolt.

[0016] The bottom of the limit protrusion is a slope.

[0017] Flange plates are respectively provided at the inlet end and the outlet end of the check valve body, and annular sealing bevels are provided on the flange plates.

[0018] 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. The 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.

[0019] A valve cover is provided on the top of the check valve body.

[0020] The advantages of the present utility model are as follows: As the temperature decreases, the gas in the inflatable rubber ring shrinks, creating space and preventing the water in the valve from bursting the valve due to ice expansion after freezing. The sealing performance between the valve flap and the valve seat is good.

[0021] When the valve flap opens, the collision noise is small, extending the service life of the valve. The valve seat is installed in a detachable manner, facilitating maintenance when the sealing 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 cross-sectional structural diagram of the globe valve of the present utility model.

[0024] Figure 3 It is a schematic structural diagram of the inflatable rubber ring of the globe valve of the present utility model.

[0025] Figure 4 It is a schematic structural diagram of the inflation nozzle of the present utility model.

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

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

[0028] Figure 7 It is a schematic structural diagram when the check valve flap closes of the present utility model. 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 in conjunction with 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. Generally, the components of the embodiments of the present invention described and illustrated in the 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 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 product of the invention 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. Therefore, it should not be construed as a limitation to 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 "set", "connect" are 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 conveying pipeline 200, a medium storage tank 201, a check valve 202 and a globe valve 203.

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

[0036] The globe valve 203 includes a valve body 1, a valve seat 2, a valve stem 3 and a set of inflatable rubber rings 4.

[0037] The valve seat 2 is installed on the inner wall of the central flow cavity in the middle of the valve body 1. A valve flap 5 is provided at the bottom of the valve stem 3. The valve stem 3 is movably and hermetically installed in the valve body 1. By rotating the valve stem 3, the valve flap 5 is driven to rise or fall in the valve body 1. When the valve flap 5 falls, it presses tightly on the top of the valve flap 5 to close the central flow cavity. Rubber ring installation grooves are respectively provided on the inner walls of the inlet pipeline and the outlet pipeline of the valve body 1, and a set of inflatable rubber rings 4 are installed in the corresponding rubber ring installation grooves.

[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 mounting groove is formed on the inner wall of the check valve body 101 near the inlet end side. The check valve seat 102 is installed in the valve seat mounting 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 limit projection 105 is provided on the upper inner wall of the check valve body 101. An elastic buffer piece 106 is provided on the rocker arm 104. The elastic buffer piece 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 piece 106 abuts against the limit projection 105.

[0039] Internal threads are provided on the inner wall of the central flow cavity of the valve body 1. External threads are provided on the outer wall of the valve seat 2. The valve seat 2 is threadedly installed on the inner wall of the central flow cavity of the valve body 1; an annular inclined sealing surface is formed on the inner wall of the top of the valve seat 2. An annular inclined sealing projection matching the annular inclined sealing surface is provided on the lower outer wall of the valve flap 5; one side of the rubber ring mounting groove is the open end of the valve body, and the other side of the rubber ring mounting groove is the inner cavity of the valve body. The inner wall diameter of the valve body 1 on one side of the rubber ring mounting groove is larger than the inner wall diameter of the valve body 1 on the other side of the rubber ring mounting groove.

[0040] After the inflatable rubber ring 4 is inflated and expanded, the inner ring cross-section of the inflatable rubber ring 4 is arc-shaped, and the outer ring cross-section of the inflatable rubber ring 4 is rectangular; an air nozzle mounting groove is provided on the outer ring of the inflatable rubber ring 4, and an inflatable nozzle 6 is provided in the air nozzle mounting groove.

[0041] A valve cover is provided on the top of the valve body 1. The valve stem 3 is movably and hermetically installed in the valve cover through packing seal. The bottom of the valve stem 3 is located inside the valve body 1; a rubber ring mounting groove is provided in the top opening of the valve body 1, and an inflatable rubber ring 4 is provided in the rubber ring mounting groove.

[0042] Internal threads are provided on the inner wall of the valve seat mounting groove. 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 mounting 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.

[0043] A rocker arm mounting seat is provided on the upper inner wall of the check valve body 101. 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.

[0044] The bottom of the limit projection 105 is a slope.

[0045] 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.

[0046] 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.

[0047] A valve cover is arranged at the top of the check valve body 101.

[0048] Embodiment 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 globe valve 203, and the check valve 202 is used to prevent the medium in the medium storage tank 201 from flowing back.

[0049] When installing the globe valve 203, the valve body 1 is installed on the water conveying pipeline. The water flow enters the lower chamber of the valve body 1 and flows into the upper chamber along the valve seat 2, and then is output. When it is necessary to close the valve, turn the handwheel at the top of the valve stem 3, and the valve flap 5 moves downward and presses against the sealing surface at the top of the valve seat 2 to cut off the water flow. When the temperature is normal, the inflatable rubber ring 4 expands and fills the rubber ring installation groove. When the temperature drops below zero degree Celsius, the water in the valve freezes. At the same time, the gas in the inflatable rubber ring 4 shrinks, and the inflatable rubber ring 4 becomes deflated, leaving space for ice formation to avoid bursting the valve.

[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 and forms a seal with the end face of the check valve seat 102 to prevent the fluid medium from flowing back. When the check valve flap 103 opens, the elastic buffer piece 106 contacts the bottom inclined surface 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 connecting the check valve body 101 to the pipeline, a circular groove that matches the annular sealing inclined port 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 liquid medium pipeline valve combination system, characterized in that It comprises a medium delivery pipeline (200), a medium storage tank (201), a check valve (202) and a stop 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 stop 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 stop valve (203) comprises a valve body (1), a valve seat (2), a valve stem (3) and a set of inflatable rubber rings (4). The valve seat (2) is mounted on the inner wall of the flow cavity in the middle of the valve body (1), a valve disc (5) is arranged at the bottom of the valve stem (3), and the valve stem (3) is movably sealed and mounted in the valve body (1). The valve stem (3) is rotated to drive the valve disc (5) to rise or fall in the valve body (1), and the valve disc (5) is lowered and pressed against the top of the valve disc (5), closing the flow cavity in the middle. Rubber ring mounting grooves are respectively arranged on the inner walls of the inlet pipe and the outlet pipe of the valve body (1), and a group of inflatable rubber rings (4) are mounted in the corresponding rubber ring mounting grooves. 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 liquid medium pipeline valve combination system according to claim 1, characterized in that: An internal thread is provided on the inner wall of the flow cavity in the middle of the valve body (1), and an external thread is provided on the outer wall of the valve seat (2). The valve seat (2) is threadedly mounted on the inner wall of the flow cavity in the middle of the valve body (1); an annular inclined sealing surface is provided on the inner wall at the top of the valve seat (2), and an annular inclined sealing protrusion matching the annular inclined sealing surface is provided on the lower outer wall of the valve disc (5); one side of the rubber ring installation groove is the valve body opening end, and the other side of the rubber ring installation groove is the valve body inner cavity, and the inner wall diameter of the valve body (1) on one side of the rubber ring installation groove is larger than the inner wall diameter of the valve body (1) on the other side of the rubber ring installation groove.

3. A liquid medium pipeline valve combination system according to claim 2, characterized in that: After the inflatable rubber ring (4) is inflated, the inner ring cross-section of the inflatable rubber ring (4) is arc-shaped, and the outer ring cross-section of the inflatable rubber ring (4) is rectangular; an air nozzle mounting groove is provided on the outer ring of the inflatable rubber ring (4), and an inflatable nozzle (6) is provided in the air nozzle mounting groove.

4. The liquid medium pipeline valve combination system according to claim 1 is characterized in that: A valve cover is arranged on the top of the valve body (1), a valve stem (3) is installed in the valve cover through a seasoning seal, and the bottom of the valve stem (3) is located in the valve body (1); a rubber ring installation groove is arranged in the top opening of the valve body (1), and an inflatable rubber ring (4) is arranged in the rubber ring installation groove.

5. The liquid medium pipeline valve combination system according to claim 1 is 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).

6. The liquid medium pipeline valve combination system according to claim 1 is 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.

7. The liquid medium pipeline valve combination system according to claim 1 is characterized in that: The bottom of the limiting protrusion (105) is an inclined surface.

8. The liquid medium pipeline valve combination system according to claim 1 is 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).

9. The liquid medium pipeline valve combination system according to claim 1, characterized in that: A valve disc mounting hole is formed on the rocker arm (104), a positioning protrusion (110) is provided 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, and the check valve disc (103) is pressed onto the rocker arm (104) through the nut of the locking screw.

10. The liquid medium pipeline valve combination system according to claim 1, characterized in that: A valve cover is arranged on the top of the check valve body (101).

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