Buffering check valve capable of manually operating and controlling angle

Abstract

The utility model provides a buffering check valve capable of manually operating and controlling an angle, which belongs to the technical field of valves and comprises a valve body, a buffering component and an adjusting component. A pin shaft is rotationally mounted in the valve body, a rocker is in key connection with the surface of the pin shaft, and a valve clack is fixedly mounted on the surface of the rocker; the positioning sleeve is installed in the valve body, the buffer spring is installed in the positioning sleeve, the guide shaft is further installed in the positioning sleeve in a sliding mode, after flow of media in the valve body is cut off, the valve clack is automatically closed, at the moment, the valve clack makes contact with the end, extending out of the positioning sleeve, of the guide shaft, the guide shaft is stressed to move towards the interior of the positioning sleeve, and the valve clack is closed. At the moment, the guide shaft drives the buffer spring to compress, the impact force of the valve clack on the sealing face of the valve seat is buffered and dissipated through the buffer spring, meanwhile, water hammers can be eliminated, and the service life of the valve body is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a buffered manually operable angle-controllable check valve. Background Art

[0002] The traditional check valve switch relies on the working medium to push the valve disc to rotate along the pin shaft through the rocker to open, and the working medium begins to flow normally. Once the pipeline fails and the working medium flows back, the backflow medium will push the valve disc to close itself, which can completely block the medium from continuing to flow back. The common problems of this swing check valve in the working conditions of highly corrosive media are: because it is used in the working conditions of highly corrosive media, the internal parts such as the valve seat and valve disc are always in contact with the corrosive medium during work, especially the highly corrosive medium, and corrosion will occur after a certain period of time. Once the sealing pair on the valve seat and valve disc is severely corroded, it will not be closed tightly, and the leakage will far exceed the leakage allowed by the standard, thereby affecting the normal operation of the device and even causing a larger accident. At present, it is quite difficult to repair the sealing pair of the check valve, and the whole valve can only be scrapped. The highly corrosion-resistant valves are made of special materials. Scrapping the whole valve will cause great economic losses. Among them, a swing check valve with application number "CN201621469677.0" is provided. The utility model sets the valve body into a left valve body and a right valve body, which reduces the space between the inflow channel and the outflow channel, is light in weight, and saves materials; when the sealing pair between the valve seat and the valve disc is severely corroded, the left valve body and the right valve body can be disassembled, the valve seat and the valve disc can be taken out, and a new valve seat and valve disc can be replaced. It is easy to install and disassemble, which greatly reduces the economic loss. However, there are still certain shortcomings in the use of the valve body: when the medium in the valve body is cut off or diverted, the swing check valve will automatically close. Since the valve body does not have a buffering function, the valve plate has a lot of impact force on the valve seat sealing surface, and the water hammer cannot be eliminated. Moreover, the valve body cannot manually control the opening degree of the valve plate. Utility Model Content

[0003] The utility model aims to provide a buffered manually operable angle-controlled check valve to solve the problem raised in the above-mentioned background technology that when the medium in the valve body is cut off or diverted, the swing check valve will automatically close, and since the valve body does not have a buffering function, the valve plate has a lot of impact force on the valve seat sealing surface, water hammer cannot be eliminated, and the valve body cannot manually control the degree of opening of the valve plate.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a buffer manually operable control angle check valve, comprising a valve body, a buffer assembly and an adjustment assembly;

[0005] Wherein: a pin is rotatably installed inside the valve body, a rocker is key-connected on the surface of the pin, and a valve disc is fixedly installed on the surface of the rocker;

[0006] The buffer assembly includes a positioning sleeve fixedly installed inside the valve body, a buffer spring is installed inside the positioning sleeve, a guide shaft is slidably installed inside the positioning sleeve, one end of the guide shaft is in contact with one end of the buffer spring, and the other end of the guide shaft extends to the outside of the positioning sleeve;

[0007] The adjusting assembly includes a bracket fixedly mounted on the outer wall of the valve body, a handle is rotatably mounted on the surface of the bracket, a control shaft is fixedly mounted on one end of the handle, a shaft is mounted on one end of the pin shaft, and one end of the control shaft passes through the valve body and is connected to the shaft by a switching pin.

[0008] As a preferred solution of the utility model: a limit rod is hingedly connected to the bottom of the handle, a return spring is arranged between the limit rod and the handle, and a limit plate is also installed on the surface of the bracket.

[0009] As a preferred solution of the utility model: a plurality of tooth grooves are formed on the surface of the limit plate, and one end of the limit rod is inserted into the tooth groove.

[0010] As a preferred solution of the utility model: a sealing filler is provided at the connection between the control shaft and the valve body.

[0011] As a preferred solution of the utility model: a packing gland is installed on the surface of the valve body at the sealing packing.

[0012] As a preferred solution of the utility model: a valve cover is provided on the top of the valve body, a bolt is threadedly connected at the connection between the valve body and the valve cover, and nuts are threadedly connected at both ends of the bolt.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] (1) A positioning sleeve is installed inside the valve body, a buffer spring is installed inside the positioning sleeve, and a guide shaft is slidably installed inside the positioning sleeve. When the medium inside the valve body stops flowing, the valve disc automatically closes. At this time, the valve disc contacts one end of the guide shaft extending to the outside of the positioning sleeve. The guide shaft is forced to move toward the inside of the positioning sleeve. At this time, the guide shaft drives the buffer spring to compress. The buffer spring is used to buffer and dissipate the impact force of the valve disc on the valve seat sealing surface. At the same time, water hammer can be eliminated, thereby extending the practical life of the valve body.

[0015] (2) Through the provided adjustment component, a bracket is installed on the outside of the valve body, and a handle is rotatably installed on the surface of the bracket. At the same time, a control shaft is installed at one end of the handle. The control shaft is connected to the shaft at one end of the pin shaft through a switching pin. When it is necessary to adjust the opening degree of the valve disc, the control shaft at one end of the handle is sleeved with the shaft rod, and the switching pin is inserted into the control shaft and the shaft rod, so that the pin shaft is driven by the handle to rotate and adjust, and the rotation of the pin shaft drives the valve disc to follow the rotation and adjustment, thereby manually controlling the opening degree of the valve disc, which is convenient for adjusting the valve body opening size according to usage requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 It is a schematic diagram of the cross-sectional structure of the utility model;

[0018] Figure 3 This is a schematic diagram of the handle structure of the utility model;

[0019] Figure 4 This is a schematic diagram of the control shaft and shaft rod installation structure of the utility model;

[0020] Figure 5 This is a schematic diagram of the structure of the buffer component of the utility model.

[0021] In the figure: 1. valve body; 2. pin shaft; 3. rocker; 4. valve disc; 5. buffer assembly; 51. positioning sleeve; 52. buffer spring; 53. guide shaft; 6. adjustment assembly; 61. bracket; 62. handle; 63. control shaft; 64. shaft; 65. switching pin; 66. limit rod; 67. return spring; 68. limit plate; 69. tooth groove; 7. sealing packing; 8. packing gland; 9. valve cover; 10. bolt; 11. nut. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the implementation of the utility model clearer, the technical solution in the implementation of the utility model will be clearly and completely described below in conjunction with the drawings in the implementation of the utility model. Obviously, the described implementation is a part of the implementation of the utility model, not all of the implementations. Based on the implementation of the utility model, all other implementations obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figure 1-Figure 5 A buffer manually operable angle control check valve comprises: a valve body 1, a buffer assembly 5 and an adjustment assembly 6; a pin shaft 2 is rotatably mounted inside the valve body 1, a rocker 3 is key-connected to the surface of the pin shaft 2, and a valve disc 4 is fixedly mounted on the surface of the rocker 3;

[0024] See also Figure 1 , Figure 5 The buffer assembly 5 includes a positioning sleeve 51 fixedly installed inside the valve body 1, a buffer spring 52 is installed inside the positioning sleeve 51, a guide shaft 53 is slidably installed inside the positioning sleeve 51, one end of the guide shaft 53 is in contact and connected with one end of the buffer spring 52, and the other end of the guide shaft 53 extends to the outside of the positioning sleeve 51.

[0025] During specific use: a positioning sleeve 51 is installed inside the valve body 1, a buffer spring 52 is installed inside the positioning sleeve 51, and a guide shaft 53 is also slidably installed inside the positioning sleeve 51. When the medium inside the valve body 1 is cut off, the valve disc 4 is automatically closed. At this time, the valve disc 4 contacts one end of the guide shaft 53 extending to the outside of the positioning sleeve 51, and the guide shaft 53 is forced to move toward the inside of the positioning sleeve 51. At this time, the guide shaft 53 drives the buffer spring 52 to be compressed, and the buffer spring 52 is used to buffer and dissipate the impact force of the valve disc 4 on the valve seat sealing surface. At the same time, it can also eliminate water hammer, thereby increasing the practical life of the valve body 1.

[0026] See also Figure 2 , Figure 4 The adjustment assembly 6 includes a bracket 61 fixedly mounted on the outer wall of the valve body 1, a handle 62 is rotatably mounted on the surface of the bracket 61, a control shaft 63 is fixedly mounted on one end of the handle 62, a shaft rod 64 is mounted on one end of the pin shaft 2, and one end of the control shaft 63 passes through the valve body 1 and is connected to the shaft rod 64 through a switching pin 65.

[0027] During specific use: a bracket 61 is installed on the outside of the valve body 1, and a handle 62 is rotatably installed on the surface of the bracket 61. At the same time, a control shaft 63 is installed at one end of the handle 62. The control shaft 63 is connected to the shaft 64 at one end of the pin shaft 2 through a switching pin 65. When it is necessary to adjust the opening degree of the valve disc 4, the control shaft 63 at one end of the handle 62 is sleeved with the shaft 64, and the switching pin 65 is inserted into the control shaft 63 and the shaft 64, so that the handle 62 drives the pin shaft 2 to rotate and adjust, and the rotation of the pin shaft 2 drives the valve disc 4 to follow the rotation and adjustment, thereby manually controlling the opening degree of the valve disc 4, which is convenient for adjusting the opening size of the valve body 1 according to usage requirements.

[0028] See also Figure 3 A limit rod 66 is hinged at the bottom of the handle 62, and a return spring 67 is provided between the limit rod 66 and the handle 62. A limit plate 68 is also installed on the surface of the bracket 61, and a plurality of tooth grooves 69 are opened on the surface of the limit plate 68. One end of the limit rod 66 is inserted into the tooth groove 69.

[0029] During specific use: a limit rod 66 is hingedly connected to the bottom of the handle 62, and a return spring 67 is provided at the connection between the handle 62 and the limit rod 66. A limit plate 68 is installed on the surface of the bracket 61, and a plurality of tooth grooves 69 are provided on the surface of the limit plate 68. When the handle 62 is held and the limit rod 66 is pressed, the limit rod 66 squeezes and accumulates force on the return spring 67. At this time, one end of the limit rod 66 moves out from the tooth groove 69 on the surface of the limit plate 68, so that it is convenient to rotate the handle 62 to adjust the opening size of the valve flap 4. When the adjustment is completed, the limit rod 66 is released, and the return spring 67 pushes the limit rod 66 to reset, so that one end of the limit rod 66 is inserted into the tooth groove 69. At this time, the handle 62 is limited by the limit rod 66 and remains fixed, so that the opening of the valve flap 4 remains unchanged.

[0030] See also Figure 2 A sealing packing 7 is provided at the connection point between the control shaft 63 and the valve body 1 , and a packing gland 8 is installed at the sealing packing 7 on the surface of the valve body 1 .

[0031] During specific use: a sealing packing 7 is provided at the connection between the control shaft 63 and the valve body 1 to play a sealing role to prevent water from leaking out. At the same time, a packing gland 8 is installed on the surface of the valve body 1 so that the sealing packing 7 is tightly filled in the connection between the valve body 1 and the control shaft 63.

[0032] See also Figure 1 A valve cover 9 is provided on the top of the valve body 1, and a bolt 10 is threadedly connected to the connection between the valve body 1 and the valve cover 9, and nuts 11 are threadedly connected to both ends of the bolt 10.

[0033] During specific use: a valve cover 9 is provided on the top of the valve body 1 , and the valve body 1 and the valve cover 9 are connected together by bolts 10 , and nuts 11 are connected at both ends of the bolts 10 so that the valve body 1 and the valve cover 9 are tightly connected.

[0034] A positioning sleeve 51 is installed inside the valve body 1, and a buffer spring 52 is installed inside the positioning sleeve 51. A guide shaft 53 is also slidably installed inside the positioning sleeve 51. When the flow of the medium inside the valve body 1 is cut off, the valve disc 4 is automatically closed. At this time, the valve disc 4 contacts one end of the guide shaft 53 extending to the outside of the positioning sleeve 51, and the guide shaft 53 is forced to move toward the inside of the positioning sleeve 51. At this time, the guide shaft 53 drives the buffer spring 52 to be compressed. The buffer spring 52 is used to buffer and dissipate the impact force of the valve disc 4 on the valve seat sealing surface. At the same time, water hammer can be eliminated, thereby improving the practical life of the valve body 1.

[0035] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in the field. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for technical personnel in the field to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A buffer manually operable angle control check valve, characterized in that: include: A valve body (1), wherein a pin shaft (2) is rotatably mounted inside the valve body (1), a rocker (3) is key-connected to the surface of the pin shaft (2), and a valve flap (4) is fixedly mounted on the surface of the rocker lever (3); A buffer assembly (5), the buffer assembly (5) comprising a positioning sleeve (51) fixedly mounted inside the valve body (1), a buffer spring (52) being mounted inside the positioning sleeve (51), a guide shaft (53) being slidably mounted inside the positioning sleeve (51), one end of the guide shaft (53) being in contact and connected with one end of the buffer spring (52), and the other end of the guide shaft (53) extending to the outside of the positioning sleeve (51); An adjusting component (6), the adjusting component (6) comprising a bracket (61) fixedly mounted on the outer wall of the valve body (1), a handle (62) being rotatably mounted on the surface of the bracket (61), a control shaft (63) being fixedly mounted on one end of the handle (62), a shaft (64) being mounted on one end of the pin shaft (2), and one end of the control shaft (63) passing through the valve body (1) and connected to the shaft (64) via a switching pin (65).

2. A buffer manually operable angle control check valve according to claim 1, characterized in that: A limit rod (66) is hingedly connected to the bottom of the handle (62), a return spring (67) is provided between the limit rod (66) and the handle (62), and a limit plate (68) is also installed on the surface of the bracket (61).

3. A buffer manually operable angle control check valve according to claim 2, characterized in that: A plurality of tooth grooves (69) are formed on the surface of the limiting plate (68), and one end of the limiting rod (66) is inserted into the tooth groove (69).

4. A buffer manually operable angle control check valve according to claim 1, characterized in that: A sealing filler (7) is provided at the connection between the control shaft (63) and the valve body (1).

5. A buffer manually operable angle control check valve according to claim 1, characterized in that: A packing gland (8) is installed on the surface of the valve body (1) at the sealing packing (7).

6. A buffer manually operable angle control check valve according to claim 1, characterized in that: A valve cover (9) is provided on the top of the valve body (1), a bolt (10) is threadedly connected to the connection between the valve body (1) and the valve cover (9), and nuts (11) are threadedly connected to both ends of the bolt (10).

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