Built-in check valve

Abstract

The utility model discloses a built-in check valve, and belongs to the technical field of check valves, the built-in check valve comprises a valve body, a flow channel and a valve clack, the flow channel is arranged in the valve body, the inner surface of the valve body is fixedly connected with a positioning block, and the positioning block is in threaded connection with a plurality of first bolts; the valve is novel in design and ingenious in device, the positioning block is connected to the valve body through the first bolt, the connecting rod is arranged between the positioning block and the valve clack, one end of the connecting rod is fixedly connected to the valve clack through the second bolt, and the other end of the connecting rod is hinged to the positioning block through the rotating shaft; the valve clack rotates towards one side under the impact of a medium so as to open the flow channel and promote the flow channel to be in an open state, if the medium flows reversely, the valve clack rotates reversely under the action of the medium so as to close the flow channel and promote the flow channel to be in a closed state, when the valve clack is installed on the check valve, holes do not need to be additionally punched in the valve body, the medium is not prone to seeping outwards, and the sealing performance is good. And the practicability of the device is greatly improved.

Description

Technical Field

[0001] This application relates to the technical field of check valves, and particularly to an internal check valve. Background Art

[0002] A check valve refers to a valve whose closing member is a circular valve disc and which blocks the reverse flow of the medium by its own weight and the action of the medium pressure. It belongs to the category of automatic valves and is also called a non-return valve, a one-way valve, a reflux valve or an isolation valve. The movement mode of the valve disc is divided into a lifting type and a swing type. The lifting check valve is similar in structure to a globe valve, only lacking the valve stem that drives the valve disc. The medium enters from the inlet end. The swing check valve has an obliquely arranged valve disc that can rotate around an axis, and its working principle is similar to that of the lifting check valve. The check valve is commonly used as the bottom valve of a pumping device to prevent the backflow of water. When combined with a globe valve, it can play a role in safety isolation. However, its disadvantages are large resistance and poor sealing performance when closed.

[0003] In a traditional check valve, the rod used to connect the valve disc is inserted through the valve body. During production, it is necessary to drill holes in the valve body additionally, resulting in the phenomenon that the medium is likely to leak out along the gap between the rod and the hole.

[0004] Therefore, this application proposes an internal check valve. Utility Model Content

[0005] An internal check valve proposed in this application is used to solve the problems raised in the above background art. A positioning block is connected to the valve body through a first bolt. A connecting rod is arranged between the positioning block and the valve disc. One end of the connecting rod is fixedly connected to the valve disc through a second bolt, and the other end is hinged to the positioning block through a rotating shaft. When the medium flows into the valve body in a specified direction, the valve disc will rotate to one side under the impact of the medium to open the flow channel, making the flow channel in an open state. If the medium flows in the reverse direction, the valve disc will rotate in the reverse direction under the action of the medium to close the flow channel, making the flow channel in a closed state. When installing the valve disc of this check valve, there is no need to drill holes in the valve body additionally, the medium is not likely to leak outwards, and the sealing performance is good, greatly improving the practicability of the device.

[0006] In order to achieve the above object, this application adopts the following technical solutions:

[0007] An internal check valve includes a valve body, a flow channel and a valve disc. The flow channel is arranged inside the valve body. A positioning block is fixedly connected to the inner surface of the valve body. A plurality of first bolts are threadedly connected to the positioning block, and each first bolt extends into the valve body. Two grooves are formed inside the positioning block. A rotating shaft is rotatably connected between the two grooves. A connecting rod is fixedly connected to the rotating shaft, and the end of the connecting rod away from the rotating shaft is fixedly connected to the valve disc.

[0008] As a preferred embodiment, a second bolt is threadedly connected to the connecting rod, and one end of the second bolt extends into the valve flap;

[0009] By providing the second bolt, one end of the connecting rod is fixedly connected to the valve flap through the second bolt, thereby enhancing the practicality of the device.

[0010] As a preferred embodiment, a sealing sleeve is installed on the valve flap, and the sealing sleeve includes a clamping groove;

[0011] By providing the sealing sleeve, the material can be hydrogenated nitrile rubber, which has corrosion resistance, tear resistance and compression set resistance characteristics, thereby enhancing the practicality of the device.

[0012] As a preferred embodiment, the clamping groove is opened inside the sealing sleeve, and the sealing sleeve is installed on the valve flap through the clamping groove;

[0013] By providing the sealing sleeve, a clamping groove is opened on the sealing sleeve, and the sealing sleeve is conveniently installed on the valve flap through the clamping groove to improve the sealing performance when the valve flap closes the flow channel, thereby enhancing the practicality of the device.

[0014] As a preferred embodiment, the valve flap is arranged on the flow channel of the valve body, and the sealing sleeve on the valve flap is sealingly connected to the flow channel;

[0015] With the valve flap on the flow channel for closing or opening the flow channel, and a sealing sleeve added to the valve flap to enhance the sealing performance when the valve flap closes the flow channel, thereby enhancing the practicality of the device.

[0016] As a preferred embodiment, adjusting blocks are sleeved on both ends of the rotating shaft, and one side of the two adjusting blocks contacts the outside of the connecting rod, and the other side extends into the groove;

[0017] By rotating the two adjusting blocks counterclockwise, the two adjusting blocks will extend into the grooves of the positioning blocks. At this time, the connecting rod is in a relatively loose state. On the contrary, by rotating the two adjusting blocks clockwise, the two adjusting blocks will move towards the connecting rod to tighten the tightness of the connecting rod, thereby enhancing the practicality of the device.

[0018] As a preferred embodiment, first threads are provided inside the two adjusting blocks, and second threads are provided at both ends of the rotating shaft;

[0019] By providing the first threads and the second threads, it is convenient to adjust and fix the movement of the adjusting blocks. The structure is simple and the operation is convenient, thereby enhancing the practicality of the device.

[0020] As a preferred embodiment, the two adjusting blocks are threadedly connected to the rotating shaft through the first threads and the second threads;

[0021] By setting adjusting blocks, a first thread is provided inside the adjusting blocks and second threads are provided at both ends of the rotating shaft. By rotating the two adjusting blocks clockwise or counterclockwise, the two adjusting blocks can be moved towards or away from the connecting rod, so as to adjust the tightness of the connecting rod according to the usage requirements, prevent the connecting rod from being prone to loosening during long-term use, which affects the use effect of the valve flap, and thus improves the practicability of the device.

[0022] Advantages of this application:

[0023] 1. For this built-in check valve, a positioning block is connected to the valve body through a first bolt. A connecting rod is arranged between the positioning block and the valve flap. One end of the connecting rod is fixedly connected to the valve flap through a second bolt, and the other end is hinged to the positioning block through a rotating shaft. When the medium flows into the valve body along the specified direction, the valve flap will rotate to one side under the impact of the medium to open the flow channel and make the flow channel in an open state. If the medium flows reversely, the valve flap will rotate reversely under the action of the medium to close the flow channel and make the flow channel in a closed state. When installing the valve flap of this check valve, there is no need to drill holes in the valve body additionally, the medium is not easy to seep outwards, and the sealing performance is good, which greatly improves the practicability of the device;

[0024] 2. For this built-in check valve, by setting a sealing sleeve and providing a clamping groove on the sealing sleeve, the sealing sleeve can be conveniently installed on the valve flap through the clamping groove to improve the sealing performance when the valve flap closes the flow channel. By setting adjusting blocks, a first thread is provided inside the adjusting blocks and second threads are provided at both ends of the rotating shaft. By rotating the two adjusting blocks clockwise or counterclockwise, the two adjusting blocks can be moved towards or away from the connecting rod, so as to adjust the tightness of the connecting rod according to the usage requirements, prevent the connecting rod from being prone to loosening during long-term use, which affects the use effect of the valve flap, and greatly improves the practicability of the device. Description of the drawings

[0025] Figure 1 Schematic diagram of the valve flap closing of the device of this application;

[0026] Figure 2 Schematic diagram of the valve flap opening of the device of this application;

[0027] Figure 3 For this application Figure 1 Enlarged view of part A.

[0028] Reference numerals in the figure: 1, valve body; 2, flow channel; 3, positioning block; 4, first bolt; 5, groove; 6, rotating shaft; 7, connecting rod; 8, valve flap; 9, second bolt; 10, sealing sleeve; 11, clamping groove; 12, adjusting block; 13, first thread; 14, second thread. Detailed implementation manners

[0029] Next, in combination with the accompanying drawings in the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments.

[0030] Refer to Figures 1-3 , an internal check valve, including a valve body 1, a flow channel 2 and a valve flap 8. The flow channel 2 is arranged inside the valve body 1. A positioning block 3 is fixedly connected to the inner surface of the valve body 1. A plurality of first bolts 4 are threadedly connected to the positioning block 3, and each first bolt 4 extends into the valve body 1. Two grooves 5 are opened inside the positioning block 3. A rotating shaft 6 is rotatably connected between the two grooves 5. A connecting rod 7 is fixedly connected to the rotating shaft 6, and one end of the connecting rod 7 away from the rotating shaft 6 is fixedly connected to the valve flap 8.

[0031] A second bolt 9 is threadedly connected to the connecting rod 7, and one end of the second bolt 9 extends into the valve flap 8; by setting the second bolt 9, one end of the connecting rod 7 is fixedly connected to the valve flap 8 through the second bolt 9, thereby improving the practicality of the device.

[0032] A sealing sleeve 10 is installed on the valve flap 8. The sealing sleeve 10 includes a clamping groove 11; by setting the sealing sleeve 10, the material can be hydrogenated nitrile rubber, which has anti-corrosion, anti-tear and anti-compression deformation characteristics, thereby improving the practicality of the device.

[0033] The clamping groove 11 is opened inside the sealing sleeve 10, and the sealing sleeve 10 is installed on the valve flap 8 through the clamping groove 11; by setting the sealing sleeve 10 and opening the clamping groove 11 on the sealing sleeve 10, the sealing sleeve 10 is conveniently installed on the valve flap 8 through the clamping groove 11 to improve the sealing performance when the valve flap 8 closes the flow channel 2, thereby improving the practicality of the device.

[0034] The valve flap 8 is arranged on the flow channel 2 of the valve body 1, and the sealing sleeve 10 on the valve flap 8 is hermetically connected to the flow channel 2; the valve flap 8 is arranged on the flow channel 2 to close or open the flow channel 2, and a sealing sleeve 10 is added to the valve flap 8 to strengthen the sealing performance when the valve flap 8 closes the flow channel 2, thereby improving the practicality of the device.

[0035] Adjusting blocks 12 are sleeved on both ends of the rotating shaft 6. One side of the two adjusting blocks 12 is in contact with the outside of the connecting rod 7, and the other side extends into the groove 5 inside; by rotating the two adjusting blocks 12 counterclockwise, the two adjusting blocks 12 will extend into the groove 5 of the positioning block 3. At this time, the connecting rod 7 is in a relatively loose state. On the contrary, by rotating the two adjusting blocks 12 clockwise, the two adjusting blocks 12 will move towards the connecting rod 7 to tighten the tightness of the connecting rod 7, thereby improving the practicality of the device.

[0036] First threads 13 are provided inside both of the two adjusting blocks 12, and second threads 14 are provided at both ends of the rotating shaft 6; by providing the first threads 13 and the second threads 14, it is convenient to adjust and fix the movement of the adjusting blocks 12, with a simple structure and convenient operation, thus improving the practicability of the device.

[0037] The two adjusting blocks 12 are threadedly connected to the rotating shaft 6 through the first threads 13 and the second threads 14; by providing the adjusting blocks 12, providing the first threads 13 inside the adjusting blocks 12 and the second threads 14 at both ends of the rotating shaft 6, by rotating the two adjusting blocks 12 clockwise or counterclockwise, the two adjusting blocks 12 can be made to move towards or away from the connecting rod 7, so as to adjust the tightness of the connecting rod 7 according to the usage requirements, preventing the connecting rod 7 from being prone to loosening during long-term use and affecting the usage effect of the valve flap 8, thus improving the practicability of the device.

[0038] Working principle: A positioning block 3 is connected to the valve body 1 through a first bolt 4, a connecting rod 7 is provided between the positioning block 3 and the valve flap 8, one end of the connecting rod 7 is fixedly connected to the valve flap 8 through a second bolt 9, and the other end is hinged to the positioning block 3 through a rotating shaft 6. When the medium flows into the valve body 1 in a specified direction, the valve flap 8 will rotate to one side under the impact of the medium to open the flow channel 2, causing the flow channel 2 to be in an open state. If the medium flows in the reverse direction, the valve flap 8 will rotate in the reverse direction under the action of the medium to close the flow channel 2, causing the flow channel 2 to be in a closed state.

[0039] When installing the valve flap 8 of this check valve, there is no need to drill holes in the valve body 1 additionally, and the medium is not likely to seep outwards, with good sealing performance.

[0040] By providing a sealing sleeve 10 and providing a card slot 11 on the sealing sleeve 10, the sealing sleeve 10 is conveniently installed on the valve flap 8 through the card slot 11 to improve the sealing performance when the valve flap 8 closes the flow channel 2.

[0041] By providing the adjusting blocks 12, providing the first threads 13 inside the adjusting blocks 12 and the second threads 14 at both ends of the rotating shaft 6, by rotating the two adjusting blocks 12 clockwise or counterclockwise, the two adjusting blocks 12 can be made to move towards or away from the connecting rod 7, so as to adjust the tightness of the connecting rod 7 according to the usage requirements, preventing the connecting rod 7 from being prone to loosening during long-term use and affecting the usage effect of the valve flap 8.

[0042] This technology is used to solve the problem that in a traditional check valve, the rod for connecting the valve flap is passed through the valve body, and it is necessary to drill holes in the valve body additionally during production, and the medium is likely to seep out along the gap between the rod and the hole.

[0043] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present application, according to the technical solution of the present application and its utility model concept, makes equivalent substitutions or changes, and should be covered within the protection scope of the present application.

Claims

1. An internal check valve, comprising a valve body (1), a flow passage (2) and a valve flap (8), characterized in that, The flow channel (2) is arranged inside the valve body (1). A positioning block (3) is fixedly connected to the inner surface of the valve body (1). A plurality of first bolts (4) are threadedly connected to the positioning block (3), and each of the first bolts (4) extends into the valve body (1). Two grooves (5) are formed inside the positioning block (3). A rotating shaft (6) is rotatably connected between the two grooves (5). A connecting rod (7) is fixedly connected to the rotating shaft (6), and the end of the connecting rod (7) away from the rotating shaft (6) is fixedly connected to the valve flap (8).

2. The internal check valve according to claim 1, characterized in that, A second bolt (9) is threadedly connected to the connecting rod (7), and one end of the second bolt (9) extends into the valve flap (8).

3. The internal check valve according to claim 1, characterized in that, A sealing sleeve (10) is installed on the valve flap (8), and the sealing sleeve (10) includes a clamping groove (11).

4. An internal check valve according to claim 3, characterized in that, The clamping groove (11) is formed inside the sealing sleeve (10), and the sealing sleeve (10) is installed on the valve flap (8) through the clamping groove (11).

5. The built-in check valve according to claim 3, characterized in that, The valve flap (8) is arranged on the flow channel (2) of the valve body (1), and the sealing sleeve (10) on the valve flap (8) is in sealed connection with the flow channel (2).

6. The internal check valve according to claim 1, characterized in that, Adjusting blocks (12) are sleeved at both ends of the rotating shaft (6). One side of the two adjusting blocks (12) is in contact with the outside of the connecting rod (7), and the other side extends into the groove (5).

7. The internal check valve according to claim 6, characterized in that, First threads (13) are arranged inside the two adjusting blocks (12), and second threads (14) are arranged at both ends of the rotating shaft (6).

8. The internal check valve according to claim 6, characterized in that, The two adjusting blocks (12) are threadedly connected to the rotating shaft (6) through the first threads (13) and the second threads (14).

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