A check valve

Abstract

The utility model provides a check valve, belonging to the field of valve technology. It solves the problem that existing valve flap seal problems cannot be discovered in time. The check valve includes a valve body with an inlet and outlet and a check cavity, and a valve flap arranged in the valve body, and the inner wall of the valve body radially protrudes inward to form a sealing protrusion that contacts and seals with the valve flap, and the valve body is provided with a shaft rod whose two ends respectively contact with the inner wall of the valve body, are connected to the valve flap, and control the movement of the valve flap around its axis, and the two ends of the shaft rod extend axially outward and extend out of the valve body, and the valve body is provided with two through holes for the shaft rod to pass through and install, and the outer wall of the valve body located at the through hole is provided with an auxiliary protrusion that protrudes axially outward and matches with the shaft rod, and the outer peripheral wall of the valve body is provided with a motion unit connected to it and used to control the movement of the shaft rod. The utility model has the advantage of being able to observe in time.

Description

Technical Field

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

[0002] The existing check valve includes a valve body and a check valve disc. The valve body is provided with a water outlet. The check valve disc can be movably mounted on the valve body to realize the opening and closing of the water outlet. However, during long-term use, if the valve disc fails to check and seal in time, leakage will occur. At the same time, outsiders cannot observe the internal sealing condition. If it is not discovered in time, it is easy to cause losses. Summary of the invention

[0003] The utility model aims to solve the above problems existing in the prior art and provide a check valve which is convenient for humans to understand the check situation externally and has more intelligent check control.

[0004] The purpose of the utility model can be achieved through the following technical solutions: a check valve, comprising a valve body with an inlet, an outlet and a check cavity, and a valve disc arranged in the valve body, and the inner wall of the valve body radially protrudes inward to form a sealing protrusion that contacts and seals with the valve disc, characterized in that the valve body is provided with a shaft rod whose two ends respectively contact with the inner wall of the valve body, are connected to the valve disc, and control the movement of the valve disc around its axis, the two ends of the shaft rod extend axially outward and extend out of the valve body, the valve body is provided with two through holes for the shaft rod to pass through and install, and the outer wall of the valve body located at the through hole is provided with an auxiliary protrusion that protrudes axially outward and cooperates with the shaft rod, and the outer peripheral wall of the valve body is provided with a motion unit connected to it and used to control the movement of the shaft rod.

[0005] In the above-mentioned check valve, a connecting plate is provided between the shaft and the valve disc, and its two ends are respectively connected to the shaft and the valve disc, and an installation protrusion is provided on the end face of the valve disc, which protrudes axially outward and is provided for one end of the connecting plate to be inserted and installed. Two symmetrically arranged limit blocks are provided on the inner wall of the valve body and are connected to the limit blocks and are used to limit the position of the shaft, and an assembly hole is provided on the limit block for one end of the shaft to be inserted and installed, and the connecting plate is located between the two limit blocks.

[0006] In the above-mentioned check valve, the valve body is provided with a sealing ring connected to the sealing protrusion, and the end surface of the valve disc that fits the sealing protrusion is also provided with a sealing ring connected to the sealing protrusion and used to enhance the sealing performance.

[0007] In the above-mentioned check valve, the valve body is arranged in a three-way pipe structure.

[0008] In the above-mentioned check valve, the motion unit is composed of an air tank with an air cavity, a telescopic rod with a piston ring and an assembly plate. A mounting platform connected to the valve body and for mounting the assembly plate is provided on the outer peripheral wall of the valve body. The air tank is arranged on the assembly plate and connected thereto. A mounting hole for sliding installation of the telescopic rod is provided on the upper end surface of the air tank, and the piston ring of the telescopic rod is arranged in the air cavity. The piston ring slides in fit with the inner wall of the air tank, and the outer end of the telescopic rod is connected to the above-mentioned shaft rod through a connecting unit.

[0009] In the above-mentioned check valve, the connecting unit is composed of a connecting sleeve one and a connecting sleeve two, wherein the connecting sleeve one is arranged on the telescopic rod and connected to it, and the connecting sleeve two is arranged on the shaft rod and connected to it, and a connecting block connected to it is provided on the outer peripheral wall of the connecting sleeve two, and two connecting ears connected to it and symmetrically arranged are provided on the end surface of the connecting sleeve, and an installation gap is reserved between the two connecting ears for the connecting block to be inserted and installed, and the two connecting ears are connected to the connecting block through a pin shaft.

[0010] Compared with the prior art, this check valve has the following advantages:

[0011] 1. A shaft is arranged inside the valve body, and its two ends respectively contact with the inner wall of the valve body, and are connected to the valve disc, and control the movement of the valve disc around its axis. The shaft is located above the valve disc, and its two ends extend axially outward and extend out of the valve body. The valve body is provided with two through holes for the shaft to pass through and install, and an auxiliary protrusion is arranged on the outer wall of the valve body located at the through hole, which protrudes axially outward and cooperates with the shaft. The sealing of the connection is strengthened by the auxiliary protrusion, and a motion unit connected to the outer peripheral wall of the valve body and used to control the movement of the shaft is arranged. The arrangement of the above structure facilitates the observation of the closed state of the valve disc. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a three-dimensional structural diagram of this check valve.

[0013] In the figure, 1. valve body; 2. valve disc; 3. sealing protrusion; 4. shaft rod; 5. auxiliary protrusion; 6. connecting plate; 7. mounting protrusion; 8. limit block; 9. gas tank; 10. telescopic rod; 11. assembly plate; 12. mounting table; 13. connecting sleeve 1; 14. connecting sleeve 2; 15. connecting block; 16. connecting ear. DETAILED DESCRIPTION

[0014] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0015] like Figure 1As shown, the check valve comprises a valve body with an inlet, an outlet and a check cavity, and a valve disc arranged in the valve body, and the inner wall of the valve body radially protrudes inwardly to form a sealing protrusion that contacts and seals with the valve disc, and the valve body is provided with a shaft rod whose two ends respectively contact with the inner wall of the valve body, are connected to the valve disc, and control the valve disc to move around its central axis, and the shaft rod is located above the valve disc, and the two ends of the shaft rod extend axially outward and extend out of the valve body, and the valve body is provided with two through holes for the shaft rod to pass through and install, and the outer wall of the valve body located at the through hole is provided with an auxiliary protrusion that protrudes axially outward and cooperates with the shaft rod, and the sealing of the connection is enhanced by the auxiliary protrusion, and the outer peripheral wall of the valve body is provided with a shaft rod connected to it and A motion unit for controlling the movement of the shaft, a connecting plate with two ends connected to the shaft and the valve disc respectively arranged between the shaft and the valve disc, an end surface of the valve disc is provided with an axially outwardly protruding mounting protrusion for one end of the connecting plate to be inserted into and installed, the mounting protrusion is provided with an assembly groove for one end of the connecting plate to be inserted into and installed, and the mounting protrusion is also provided with a stud for fixing one end of the connecting plate to the mounting protrusion, two symmetrically arranged and connected limit blocks for limiting the position of the shaft are arranged on the inner wall of the valve body, the limit block is provided with an assembly hole for one end of the shaft to be inserted into and installed, the connecting plate is located between the two limit blocks, and the motion unit is composed of an air tank with an air cavity, a telescopic rod with a piston ring and an assembly plate A mounting platform connected to the valve body and for mounting the mounting plate is provided on the peripheral wall of the valve body. A weight-reducing hole can be provided on the mounting platform to make it a C-shaped structure. The mounting platform can also be composed of two mounting plates. The gas tank is arranged on the mounting plate and connected to the mounting plate. A mounting hole for sliding installation of the telescopic rod is provided on the upper end surface of the gas tank. The piston ring of the telescopic rod is arranged in the air cavity. The piston ring is slidably fitted with the inner wall of the gas tank. The outer end of the telescopic rod is connected to the above-mentioned shaft rod through a connecting unit. An air source can be provided on the mounting plate. The air source can also be provided outside one side of the valve body, and the air source is connected to the gas tank through a pipeline. The movement of the piston ring is realized by conveying gas and recovering gas. The above-mentioned gas tank is provided with an inlet An air joint and an air outlet joint, and the outer shell of the gas tank can be made of transparent material, an angle adjustment structure can be arranged between the above-mentioned mounting platform and the gas tank, and scale lines are arranged on the outer peripheral wall of the gas tank. The connecting unit consists of a connecting sleeve one and a connecting sleeve two, and the connecting sleeve one is arranged on the telescopic rod and connected to it, and the connecting sleeve two is arranged on the shaft rod and connected to it. A connecting block connected to the connecting sleeve two is arranged on the outer peripheral wall of the connecting sleeve, and two connecting ears connected to the connecting sleeve and symmetrically arranged are arranged on the end surface of the connecting sleeve, and an installation gap is reserved between the two connecting ears for the connecting block to be inserted and installed, and the two connecting ears are connected to the connecting block through a pin shaft, and a locking cap for limiting the position of the connecting sleeve two can be arranged on the above-mentioned shaft rod.

[0016] To elaborate further, in order to ensure the sealing after fitting, a sealing ring connected to the sealing protrusion is provided at the valve body, and a sealing ring connected to the sealing protrusion and used to enhance the sealing is also provided on the end face where the valve disc fits with the sealing protrusion, and a fitting ring that fits with the sealing ring in the sealing protrusion is provided on the end face where the valve disc fits with the sealing protrusion.

[0017] As a preferred structure, the valve body is arranged in a three-way pipe structure, and therefore the valve body has not only a water inlet and an outlet, but also an assembly port, and the valve body is provided with a sealing cover connected thereto at the assembly port.

[0018] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0019] Although the term ", " and " are used more frequently in this article, the possibility of using other terms is not excluded. These terms are used only to more conveniently describe and explain the essence of the utility model; interpreting them as any additional restrictions is contrary to the spirit of the utility model.

Claims

1. A check valve, comprising a valve body (1) with a water inlet and outlet and a check chamber, and a valve flap (2) arranged in the valve body (1), wherein the inner wall of the valve body (1) protrudes radially inward to form a sealing protrusion (3) that contacts and seals with the valve flap (2), characterized in that: The valve body (1) is provided with a shaft (4) at both ends of which respectively contact the inner wall of the valve body (1) and are connected to the valve flap (2) to control the movement of the valve flap (2) around its axis. The two ends of the shaft (4) extend axially outward and extend out of the valve body (1). The valve body (1) is provided with two through holes for the shaft (4) to pass through and install. The outer wall of the valve body (1) located at the through hole is provided with an auxiliary protrusion (5) that protrudes axially outward and cooperates with the shaft (4). The outer peripheral wall of the valve body (1) is provided with a motion unit that is connected to the shaft and is used to control the movement of the shaft (4).

2. A check valve according to claim 1, characterized in that: A connecting plate (6) is provided between the shaft (4) and the valve disc (2), with its two ends respectively connected to the shaft (4) and the valve disc (2); an end surface of the valve disc (2) is provided with an installation protrusion (7) which protrudes axially outward and into which one end of the connecting plate (6) is inserted for installation; the inner wall of the valve body (1) is provided with two symmetrically arranged limit blocks (8) which are connected thereto and are used to limit the position of the shaft (4); the limit blocks (8) are provided with an assembly hole into which one end of the shaft (4) is inserted for installation; and the connecting plate (6) is located between the two limit blocks (8).

3. A check valve according to claim 1, characterized in that: The valve body (1) is provided with a sealing ring connected to the sealing protrusion (3), and the end surface of the valve flap (2) that abuts against the sealing protrusion (3) is also provided with a sealing ring connected to the sealing protrusion (3) and used to enhance the sealing performance.

4. A check valve according to claim 1, characterized in that: The valve body (1) is arranged in a three-way pipe structure.

5. A check valve according to claim 1, characterized in that: The motion unit is composed of a gas tank (9) with an air cavity, a telescopic rod (10) with a piston ring, and an assembly plate (11). The outer peripheral wall of the valve body (1) is provided with a mounting platform (12) connected to the valve body (1) and for mounting the assembly plate (11). The gas tank (9) is arranged on the assembly plate (11) and connected thereto. A mounting hole for slidingly mounting the telescopic rod (10) is provided on the upper end surface of the gas tank (9). The piston ring of the telescopic rod (10) is arranged in the gas cavity. The piston ring is slidably fitted with the inner wall of the gas tank (9). The outer end of the telescopic rod (10) is connected to the shaft rod (4) through a connecting unit.

6. A check valve according to claim 5, characterized in that: The connecting unit is composed of a connecting sleeve 1 (13) and a connecting sleeve 2 (14), wherein the connecting sleeve 1 (13) is sleeved on the telescopic rod (10) and connected thereto, and the connecting sleeve 2 (14) is sleeved on the shaft rod (4) and connected thereto, and a connecting block (15) connected thereto is provided on the outer peripheral wall of the connecting sleeve 2 (14), and two connecting ears (16) connected thereto and symmetrically arranged are provided on the end surface of the connecting sleeve, and an installation gap is reserved between the two connecting ears (16) for the connecting block (15) to be inserted and installed, and the two connecting ears (16) are connected to the connecting block (15) via a pin shaft.

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