Stainless steel check valve

Abstract

The utility model relates to the technical field of check valves, and discloses a stainless steel check valve which comprises a valve pipe, the valve pipe is in a hollow circular pipe shape, the side wall face of the valve pipe is fixedly connected with a water inlet pipe, the other side wall face of the valve pipe is fixedly connected with a water outlet pipe, the water inlet pipe and the water outlet pipe are both in a hollow circular pipe shape, and cavities of the valve pipe and the water inlet pipe are communicated. A non-return structure is arranged in the cavity of the valve pipe and comprises a push ball, a connecting rod and a screw rod, the push ball is movably connected in the cavity of the valve pipe, the connecting rod is fixedly connected to the wall face of the push ball, the screw rod is in threaded connection in the cavity of the valve pipe, and the non-return structure can prevent water flow in the cavity of the valve pipe from flowing back. By arranging the non-return structure, the one-way water flowing state and the two-way water flowing state can be achieved, and due to the fact that the non-return structure fixes the position of the connecting rod and does not fix the position of the connecting rod, the one-way and two-way flowing state of water flow in the valve pipe cavity is achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of check valves, and in particular relates to a stainless steel check valve. Background Art

[0002] A check valve is a valve with a circular disc as the opening and closing part, which blocks the backflow of the medium by its own weight and the pressure of the medium. It belongs to the automatic valve category and is also called a non-return valve, one-way valve, reflux valve or isolation valve.

[0003] The commonly used check valves basically block the water flow by pushing the valve disc through a spring. However, if the water flow needs to be kept flowing, the commonly used check valves cannot achieve the flow of water. Therefore, a check valve that can achieve both one-way water flow and two-way water flow is needed.

[0004] In view of this, the present utility model is proposed. Utility Model Content

[0005] In order to solve the above technical problems, the basic concept of the technical solution adopted by the utility model is:

[0006] A stainless steel check valve comprises a valve pipe, which is in the shape of a hollow circular tube. A water inlet pipe is fixedly connected to the side wall of the valve pipe, and a water outlet pipe is fixedly connected to the other side wall of the valve pipe. Both the water inlet pipe and the water outlet pipe are in the shape of hollow circular tubes. The valve pipe is connected to the cavity of the water inlet pipe, and the valve pipe is also connected to the cavity of the water outlet pipe. A check structure is arranged in the cavity of the valve pipe. The check structure comprises a push ball, a connecting rod and a screw. The push ball is movably connected to the cavity of the valve pipe, the connecting rod is fixedly connected to the wall of the push ball, the screw is threadedly connected in the cavity of the valve pipe, and the push ball is spherical. The size of the push ball is consistent with that in the water inlet pipe cavity, the connecting rod is semi-cylindrical, the connecting rod is placed horizontally in the valve pipe cavity, the side wall of the connecting rod facing the water inlet pipe is fixedly connected to the push ball, the screw is cylindrical, and the check structure also includes a slot, a block and a water baffle. The slot is opened at the top of the connecting rod, and the slot is a rectangular slot. Multiple slots are opened on the top of the connecting rod, and the multiple slots are distributed in a linear array on the top of the connecting rod. The block is fixedly connected to the side wall of the push ball, and the block is also slidably connected in the water inlet pipe. The check structure can prevent water from flowing back in the valve pipe cavity.

[0007] As a preferred embodiment of the utility model, the non-return structure also includes an alignment plate and a limiting ring. The alignment plate is symmetrically fixedly connected to the cavity of the water inlet pipe, and the limiting ring is fixedly connected to the cavity of the water outlet pipe. The alignment plate is a semicircular plate, and the alignment plate is symmetrically fixedly connected to the cavity of the water inlet pipe up and down. The limiting ring is in the shape of a circular ring, and a rectangular rod is vertically fixedly connected to the cavity of the limiting ring.

[0008] As a preferred embodiment of the utility model, the symmetrical alignment plates can adapt to the wall of the card block, the cross-section of the card block is triangular, the top wall of the card block can enter the symmetrical alignment plates, the bottom of the card block is connected to the side wall of the push ball, the connecting rod slides in the semicircular groove formed in the limit ring cavity and the rectangular rods, and the water baffle can block the other semicircular groove of the limit ring.

[0009] As a preferred embodiment of the utility model, the check structure also includes a top column, a threaded groove, a retaining ring, a retaining groove, a push column, a limit block and a handle. The top column is fixedly connected to the top of the cavity of the valve tube, the threaded groove is penetrated through the top of the top column, the retaining ring is fixedly connected in the threaded groove, the retaining groove is penetrated through the top of the retaining ring, the screw is threadedly connected in the threaded groove, the push column is rotatably connected to the bottom of the screw, the limit block is fixedly connected to the bottom of the push column, and the handle is fixedly connected to the top of the screw.

[0010] As a preferred embodiment of the utility model, the top column is cylindrical, the top column can cover the top of the valve tube, the threaded groove can adapt to the push column and the screw, the push column is slidably connected in the threaded groove, the limit block can pass through the blocking groove and enter the card slot, and the card slot can adapt to the bottom of the limit block.

[0011] As a preferred embodiment of the utility model, the bottom of the valve tube is fixedly connected to a rotating shaft, the wall of the rotating shaft is rotatably connected to a baffle, the wall of the baffle is fixedly connected to a first snap block, the wall of the valve tube is also fixedly connected to a second snap block, the baffle can cover the bottom of the valve tube, the positions of the first snap block and the second snap block are aligned, and the walls of the first snap block and the second snap block are both provided with screw holes, and bolts are threadedly connected to the screw holes.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] 1. By setting a check structure, it is possible to have one-way water flow and two-way water flow. Because the check structure can achieve one-way and two-way water flow in the valve tube cavity by fixing the position of the connecting rod and not fixing the position of the connecting rod, it can meet the needs of the user when needed. Therefore, this solution can achieve one-way water flow and two-way water flow.

[0014] 2. By setting the bottom of the valve pipe that can be opened, it is more convenient when the valve pipe cavity needs to be repaired or cleaned, and the sealing ring installed on the baffle wall will also prevent water from overflowing from the bottom of the valve pipe.

[0015] The specific implementation modes of the present utility model are further described in detail below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In the attached picture:

[0017] Figure 1It is a three-dimensional diagram of the utility model;

[0018] Figure 2 This is a cross-sectional view of the valve pipe, water inlet pipe and water outlet pipe of the utility model;

[0019] Figure 3 This is a diagram showing the connection relationship of the structure inside the valve lumen of the utility model;

[0020] Figure 4 This is a cross-section of the top column and an exploded view of the screw rod of the utility model;

[0021] Figure 5 This is a disassembled diagram of the baffle and valve tube of the utility model.

[0022] In the figure: 20, valve pipe; 21, water inlet pipe; 22, water outlet pipe; 23, rotating shaft; 24, baffle plate; 25, first snap block; 26, second snap block; 27, bolt; 30, connecting rod; 31, slot; 32, push ball; 33, block; 34, alignment plate; 35, limit ring; 36, water baffle; 40, top column; 41, threaded groove; 42, baffle ring; 43, baffle groove; 44, screw; 45, push column; 46, limit block; 47, handle. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. The following embodiments are used to illustrate the utility model.

[0024] like Figure 1 , Figure 2 and Figure 3 As shown, a stainless steel check valve includes a valve tube 20, which is in the shape of a hollow circular tube. A water inlet pipe 21 is fixedly connected to the side wall of the valve tube 20, and a water outlet pipe 22 is fixedly connected to the other side wall of the valve tube 20. The water inlet pipe 21 and the water outlet pipe 22 are both in the shape of hollow circular tubes. The valve tube 20 is connected to the cavity of the water inlet pipe 21, and the valve tube 20 is also connected to the cavity of the water outlet pipe 22. The water inlet pipe 21 and the water outlet pipe 22 are respectively connected to corresponding water pipes. This is an existing technology, so it will not be described here.

[0025] like Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, a check structure is provided in the cavity of the valve tube 20, and the check structure includes a push ball 32, a connecting rod 30 and a screw 44. The push ball 32 is movably connected in the cavity of the valve tube 20, the connecting rod 30 is fixedly connected to the wall of the push ball 32, and the screw 44 is threadedly connected in the cavity of the valve tube 20. The push ball 32 is spherical, and the size of the push ball 32 is consistent with that in the cavity of the water inlet pipe 21. The connecting rod 30 is semi-cylindrical, and the connecting rod 30 is horizontally placed in the cavity of the valve tube 20. The side wall of the connecting rod 30 facing the water inlet pipe 21 is fixedly connected to the push ball 32, and the screw 44 is cylindrical. The check structure can prevent water from flowing back in the cavity of the valve tube 20.

[0026] like Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, the push ball 32 is spherical, and the size of the push ball 32 is consistent with the cavity of the water inlet pipe 21. The connecting rod 30 is semi-cylindrical, and the connecting rod 30 is horizontally placed in the cavity of the valve tube 20. The side wall of the connecting rod 30 facing the water inlet pipe 21 is fixedly connected to the push ball 32. The screw 44 is cylindrical, and the non-return structure also includes a slot 31, a block 33 and a water baffle 36. The slot 31 is opened at the top of the connecting rod 30, and the slot 31 is a rectangular slot. A plurality of slots 31 are opened at the top of the connecting rod 30, and the plurality of slots 31 are distributed in a linear array at the top of the connecting rod 30. The block 33 is fixedly connected to the push rod 31. The side wall of the ball 32, the block 33 is also slidably connected in the water inlet pipe 21, the non-return structure also includes an alignment plate 34 and a limit ring 35, the alignment plate 34 is symmetrically fixedly connected to the cavity of the water inlet pipe 21, the limit ring 35 is fixedly connected to the cavity of the water outlet pipe 22, the alignment plate 34 is a semicircular plate, the alignment plate 34 is symmetrically fixedly connected to the cavity of the water inlet pipe 21, the limit ring 35 is annular, and a rectangular rod is vertically fixedly connected to the cavity of the limit ring 35. The symmetrical alignment plates 34 can adapt to the wall of the block 33, the cross section of the block 33 is triangular, and the block 33 is The top wall can enter between the symmetrical alignment plates 34, the bottom of the block 33 is connected to the side wall of the push ball 32, the connecting rod 30 slides in the semicircular groove formed by the cavity of the limit ring 35 and the rectangular rods, and the water retaining plate 36 can block the other semicircular groove of the limit ring 35. The non-return structure also includes a top column 40, a threaded groove 41, a retaining ring 42, a retaining groove 43, a push column 45, a limit block 46 and a handle 47. The top column 40 is fixedly connected to the top of the cavity of the valve tube 20, the threaded groove 41 runs through the top of the top column 40, and the retaining ring 42 is fixedly connected in the threaded groove 41. The retaining groove 43 is formed through the top of the retaining ring 42, the screw 44 is threadedly connected in the thread groove 41, the push column 45 is rotatably connected to the bottom of the screw 44, the limit block 46 is fixedly connected to the bottom of the push column 45, the handle 47 is fixedly connected to the top of the screw 44, the top column 40 is cylindrical, the top column 40 can cover the top of the valve tube 20, the thread groove 41 can adapt to the push column 45 and the screw 44, the push column 45 is slidably connected in the thread groove 41, the limit block 46 can pass through the retaining groove 43 and enter the card groove 31, and the card groove 31 can adapt to the bottom of the limit block 46;

[0027] During specific use, the water inlet pipe 21 and the water outlet pipe 22 are connected to the water pipe. When the water flows into the water inlet pipe 21, the water flow can push the block 33 to translate in the cavity of the water inlet pipe 21, and the block 33 can drive the push ball 32 to translate at the same time. The push ball 32 will drive the connecting rod 30 to translate in the cavity of the valve tube 20, and the connecting rod 30 can push the water baffle 36 to translate in the cavity of the water outlet pipe 22. The connecting rod 30 can move in the cavity of the limiting ring 35. When the connecting rod 30 pushes the water baffle 36, the water baffle 36 will change the state of originally blocking the cavity of the limiting ring 35 to not blocking. At this time, the water flow can flow into the cavity of the water outlet pipe 22. When the water flow flows from the cavity of the water outlet pipe 22 to the cavity of the water inlet pipe 21, the water flow will push the water baffle 36. The wall surface of the water baffle 36 facing the limiting ring 35 is provided with a sealing ring. The water baffle 36 will push the connecting rod 30, and the connecting rod 30 will push The push ball 32 is moved and the water flow will also push the push ball 32, which will drive the block 33 to block the symmetrical spacing of the alignment plates 34, thereby completing the check effect. When the water flow needs to remain connected, the handle 47 is manually turned, and the handle 47 can drive the screw 44 to rotate in the thread groove 41. The screw 44 will push the push column 45 toward the vertical bottom when rotating, and the push column 45 will drive the limit block 46 to pass through the retaining groove 43 and enter the card groove 31 when moving, thereby locking the position of the connecting rod 30. If the block 33 at this time does not block the spacing of the alignment plates 34 and the water baffle plate 36 does not block the semicircular cavity of the limit ring 35, the water flows in the water outlet pipe 22 and the water inlet pipe 21 can be interconnected. If the two-way flow state needs to be stopped, the handle 47 can be turned in the other direction to drive the limit block 46 out of the card groove 31;

[0028] To summarize, by setting a check structure, it is possible to have one-way water flow and two-way water flow. This is because the check structure can achieve one-way and two-way water flow in the valve tube 20 cavity by fixing the position of the connecting rod 30 and not fixing the position of the connecting rod 30 to meet the needs of the user when needed. Therefore, this solution can achieve one-way water flow and two-way water flow.

[0029] like Figure 2 and Figure 5 As shown, the bottom of the valve tube 20 is fixedly connected with a rotating shaft 23, the wall surface of the rotating shaft 23 is rotatably connected with a baffle 24, the wall surface of the baffle 24 is fixedly connected with a first buckle block 25, the wall surface of the valve tube 20 is also fixedly connected with a second buckle block 26, the baffle 24 can shield the bottom of the valve tube 20, the positions of the first buckle block 25 and the second buckle block 26 are aligned, and the walls of the first buckle block 25 and the second buckle block 26 are both provided with screw holes, and the inner threads of the screw holes are connected with bolts 27;

[0030] When in use, the bolt 27 is rotated to turn the baffle 24 around the rotating shaft 23, so that the state of originally blocking the bottom of the valve tube 20 is converted into a state of opening the bottom of the valve tube 20. A sealing ring is installed on the wall of the baffle 24 facing the bottom of the valve tube 20.

[0031] In summary, by providing the bottom of the valve tube 20 that can be opened, it is more convenient when the cavity of the valve tube 20 needs to be repaired or cleaned, and the sealing ring installed on the wall of the baffle 24 will also prevent water from overflowing from the bottom of the valve tube 20.

[0032] Working principle: connect the water inlet pipe 21 and the water outlet pipe 22 to the water pipe. When the water flows into the water inlet pipe 21, the water flow can push the block 33 to translate in the cavity of the water inlet pipe 21. The block 33 can drive the push ball 32 to translate at the same time. The push ball 32 will drive the connecting rod 30 to translate in the cavity of the valve tube 20. The connecting rod 30 can push the water baffle 36 to translate in the cavity of the water outlet pipe 22. The connecting rod 30 can move in the cavity of the limit ring 35. When the connecting rod 30 pushes the water baffle 36, the water baffle 36 will move the originally blocked The state in the cavity of the limiting ring 35 changes to unblocked, and the water flow can flow into the cavity of the water outlet pipe 22 at this time. When the water flow flows from the cavity of the water outlet pipe 22 to the cavity of the water inlet pipe 21, the water flow will push the water baffle 36. The wall surface of the water baffle 36 facing the limiting ring 35 is provided with a sealing ring. The water baffle 36 will push the connecting rod 30, the connecting rod 30 will push the push ball 32, and the water flow will also push the push ball 32. The push ball 32 will drive the block 33 to block the symmetrical spacing of the alignment plate 34, thereby completing the non-return effect.

[0033] It is understood that the present invention is described by some embodiments, and those skilled in the art are aware that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the scope of protection of the present invention.

Claims

1. A stainless steel check valve, comprising a valve tube (20), the valve tube (20) being in the shape of a hollow circular tube, a water inlet pipe (21) being fixedly connected to a side wall of the valve tube (20), a water outlet pipe (22) being fixedly connected to the other side wall of the valve tube (20), the water inlet pipe (21) and the water outlet pipe (22) both being in the shape of a hollow circular tube, the valve tube (20) being in communication with the cavity of the water inlet pipe (21), and the valve tube (20) being in communication with the cavity of the water outlet pipe (22), characterized in that: A check structure is arranged in the cavity of the valve tube (20), the check structure comprising a push ball (32), a connecting rod (30) and a screw (44); the push ball (32) is movably connected in the cavity of the valve tube (20); the connecting rod (30) is fixedly connected to the wall surface of the push ball (32); the screw (44) is threadedly connected in the cavity of the valve tube (20); the push ball (32) is spherical, the size of the push ball (32) is consistent with that in the cavity of the water inlet pipe (21); the connecting rod (30) is semi-cylindrical, the connecting rod (30) is horizontally arranged in the cavity of the valve tube (20), and the side wall surface of the connecting rod (30) facing the water inlet pipe (21) and the The push ball (32) is fixedly connected, the screw rod (44) is cylindrical, the non-return structure further comprises a slot (31), a block (33) and a water baffle (36), the slot (31) is arranged at the top of the connecting rod (30), the slot (31) is a rectangular slot, a plurality of slots (31) are arranged at the top of the connecting rod (30), the plurality of slots (31) are distributed in a linear array at the top of the connecting rod (30), the block (33) is fixedly connected to the side wall surface of the push ball (32), the block (33) is also slidably connected in the water inlet pipe (21), and the non-return structure can prevent water from flowing back in the cavity of the valve pipe (20).

2. The stainless steel check valve according to claim 1, characterized in that: The non-return structure further comprises an alignment plate (34) and a limiting ring (35); the alignment plate (34) is symmetrically fixedly connected in the cavity of the water inlet pipe (21); the limiting ring (35) is fixedly connected in the cavity of the water outlet pipe (22); the alignment plate (34) is a semicircular plate; the alignment plate (34) is symmetrically fixedly connected in the cavity of the water inlet pipe (21) in upper and lower directions; the limiting ring (35) is in the shape of a circular ring; a rectangular rod is vertically fixedly connected in the cavity of the limiting ring (35).

3. The stainless steel check valve according to claim 2, characterized in that: The wall surface of the block (33) can be adapted between the symmetrical alignment plates (34), the section of the block (33) is triangular, the top wall surface of the block (33) can enter between the symmetrical alignment plates (34), the bottom of the block (33) is connected to the side wall surface of the push ball (32), the connecting rod (30) slides in the semicircular groove formed by the cavity of the limiting ring (35) and the rectangular rods, and the water retaining plate (36) can cover the other semicircular groove of the limiting ring (35).

4. The stainless steel check valve according to claim 3, characterized in that: The non-return structure further comprises a top column (40), a threaded groove (41), a retaining ring (42), a retaining groove (43), a push column (45), a limit block (46) and a handle (47); the top column (40) is fixedly connected to the top of the cavity of the valve tube (20); the threaded groove (41) is penetrated through the top of the top column (40); the retaining ring (42) is fixedly connected in the threaded groove (41); the retaining groove (43) is penetrated through the top of the retaining ring (42); the screw (44) is threadedly connected in the threaded groove (41); the push column (45) is rotatably connected to the bottom of the screw (44); the limit block (46) is fixedly connected to the bottom of the push column (45); and the handle (47) is fixedly connected to the top of the screw (44).

5. The stainless steel check valve according to claim 4, characterized in that: The top column (40) is cylindrical and can cover the top of the valve tube (20). The threaded groove (41) can adapt to the push column (45) and the screw rod (44). The push column (45) is slidably connected in the threaded groove (41). The limit block (46) can pass through the stop groove (43) and enter the clamping groove (31). The clamping groove (31) can adapt to the bottom of the limit block (46).

6. The stainless steel check valve according to claim 5, characterized in that: The bottom of the valve tube (20) is fixedly connected to a rotating shaft (23), the wall of the rotating shaft (23) is rotatably connected to a baffle (24), the wall of the baffle (24) is fixedly connected to a first buckle block (25), the wall of the valve tube (20) is also fixedly connected to a second buckle block (26), the baffle (24) can shield the bottom of the valve tube (20), the positions of the first buckle block (25) and the second buckle block (26) are aligned, and the walls of the first buckle block (25) and the second buckle block (26) are both provided with screw holes, and bolts (27) are threadedly connected to the screw holes.

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