Low-temperature high-pressure stop valve

Abstract

The low-temperature and high-pressure stop valve comprises a valve body, a valve clack and a valve rod, a valve deck is connected to the upper portion of the valve body, an inflow channel, a valve seat and an outflow channel are arranged in the valve body, the upper end of the valve rod penetrates through the valve deck and then is connected with a hand wheel, the lower end of the valve clack is sleeved with a detachable protective sleeve, and the protective sleeve is connected with the valve deck. An abutting portion is arranged above the valve clack, a first inclined face is arranged on the side face of the abutting portion, a pressing assembly used for pressing the abutting portion downwards is arranged on the valve body, the pressing assembly comprises a connecting portion arranged on the side wall above the valve body, a containing cavity is formed in the connecting portion, a communicating hole is formed between the containing cavity and the interior of the valve body, and the communicating hole is communicated with the first inclined face. A pressing block capable of horizontally sliding is arranged in the containing cavity, a second inclined face capable of being matched with the first inclined face in an abutting mode is arranged at the end, facing the communicating hole, of the pressing block, a screw hole is formed in the end, away from the valve body, of the connecting part, and a screw is inserted into the screw hole and rotationally connected with the pressing block.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, and particularly relates to a cryogenic high-pressure globe valve. Background Art

[0002] A globe valve, also known as a stop valve, belongs to a forced-sealing valve. Therefore, when the valve is closed, pressure must be applied to the valve flap to force the sealing surface not to leak. As a type of globe valve, a cryogenic high-pressure globe valve is generally applied to high-pressure pipelines of cryogenic media.

[0003] Currently, when the existing cryogenic high-pressure globe valve is closed, due to being in a high-pressure working condition for a long time, small deformations may occur inside the globe valve. For example, the valve flap may be worn and deformed, and may bounce upward under high-pressure impact. All these may cause a gap between the valve flap and the valve seat, resulting in poor sealing performance. Therefore, there is still a small amount of liquid that can pass through after the globe valve is closed, affecting the normal use of the valve and causing problems such as leakage of the medium. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a cryogenic high-pressure globe valve to solve the problems mentioned in the above background art.

[0005] To solve the above technical problems, the utility model adopts the following technical solutions: A cryogenic high-pressure globe valve includes a valve body, a valve flap, and a valve stem. A valve cover is connected above the valve body. An inflow channel, a valve seat, and an outflow channel are provided inside the valve body. The upper end of the valve stem passes through the valve cover and is connected to a handwheel. A detachable protective sleeve is sleeved on the lower end of the valve flap. An abutting portion is provided above the valve flap. A first inclined surface is provided on the side of the abutting portion. A pressing component for pressing down the abutting portion is provided on the valve body. The pressing component includes a connecting portion provided on the upper side wall of the valve body. A cavity is opened inside the connecting portion. A communication hole is provided between the cavity and the inside of the valve body. A pressing block that can slide horizontally is provided inside the cavity. A second inclined surface that can be in abutting cooperation with the first inclined surface is provided at one end of the pressing block facing the communication hole. A screw hole is opened at one end of the connecting portion away from the valve body. A screw is inserted into the screw hole. The screw is rotationally connected to the pressing block.

[0006] By adopting the above technical solutions, a detachable protective sleeve is sleeved on the valve flap to prevent the valve flap from being worn. When the protective sleeve is damaged, it can be replaced, extending the service life of the valve flap. The pressing component is set to increase the downward pressure on the valve core and reduce the situation of the valve flap bouncing due to force. Rotate the screw. The screw rotates and displaces in the direction of the communication hole through the thread, thereby driving the pressing block to move horizontally and pass through the communication hole into the valve body. The second inclined surface of the pressing block is in abutting cooperation with the first inclined surface of the abutting portion, thereby tightly pressing the valve core downward to be closely attached to the valve seat.

[0007] As a further optimization of the present utility model, a pair of pressing components are provided and symmetrically arranged on both sides of the valve body.

[0008] With the above technical solution, a pair of pressing components simultaneously press down on both sides of the valve core, making the force on the valve core balanced and keeping it stable.

[0009] As a further optimization of the present utility model, the protective sleeve is made of rubber, and the surface of the protective sleeve is provided with a plurality of tooth-shaped protrusions, and the protrusions are elastic.

[0010] With the above technical solution, the protrusions can be mutually extruded with the valve seat, increasing the friction and tension. After the protrusions are deformed, they rebound and can fill the gap between the valve core and the valve seat, so that the valve core and the valve seat fit more closely.

[0011] As a further optimization of the present utility model, a hydraulic sensor is provided on the side wall of the outflow channel; it also includes a controller and a signal lamp, and the controller is electrically connected to the hydraulic sensor and the signal lamp.

[0012] With the above technical solution, after the valve body is closed, the hydraulic sensor is turned on. When the hydraulic sensor detects that there is a medium flowing through the outflow channel to generate pressure, it transmits a signal to the controller, and the controller controls the signal lamp to light up, thereby reminding the staff to operate in time: increasing the downward pressure on the valve core or replacing the protective sleeve, etc.

[0013] As a further optimization of the present utility model, a chute is provided on the inner wall of the cavity along the horizontal direction, a slider is provided on the side wall of the pressing block, and the slider is slidably connected to the chute.

[0014] As a further optimization of the present utility model, an "L"-shaped handle is provided at the outer end of the screw rod.

[0015] The beneficial effects of the present utility model are as follows: The valve flap is sleeved with a detachable protective sleeve, thereby preventing the valve flap from being worn. When the protective sleeve is damaged, it can be replaced, extending the service life of the valve flap. A pressing component is provided to increase the downward pressure on the valve core, reducing the situation where the valve flap bounces due to force. Rotate the screw rod, and the screw rod rotates and displaces towards the communication hole through the thread, thereby driving the pressing block to horizontally move and pass through the communication hole into the valve body. The second inclined surface of the pressing block is in abutting cooperation with the first inclined surface of the abutting portion, thereby tightly pressing the valve core and closely fitting it with the valve seat. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural diagram of the present utility model;

[0017] Figure 2 is Figure 1 the enlarged schematic diagram in

[0018] The meanings of the reference numerals in the figure: 11, valve body; 111, inflow channel; 112, outflow channel; 113, valve seat; 12, valve cover; 13, valve stem; 14, valve core; 15, handwheel; 2, protective sleeve; 3, abutting portion; 31, first inclined surface; 32, second inclined surface; 4, connecting portion; 40, communication hole; 41, cavity; 411, sliding groove; 42, screw hole; 5, pressing block; 51, slider; 6, screw rod; 61, handle; 7, hydraulic sensor; 8, controller; 9, signal lamp. Specific embodiments

[0019] This specific embodiment is only an interpretation of the present invention and does not limit the present invention. After reading this specification, those skilled in the art can make modifications to this embodiment without creative contributions as needed, but as long as it is within the scope of the claims of the present invention, it is protected by the patent law.

[0020] Embodiment 1:

[0021] See the appendix Figure 1-2 , this embodiment disclosed by the present invention is further provided with: a cryogenic high-pressure stop valve, including a valve body 11, a valve flap and a valve stem 13. A valve cover 12 is connected above the valve body 11. An inflow channel 111, a valve seat 113 and an outflow channel 112 are provided inside the valve body 11. The upper end of the valve stem 13 passes through the valve cover 12 and is connected with a handwheel 15;

[0022] A detachable protective sleeve 2 is sleeved on the lower end of the valve flap. Further, the protective sleeve 2 is made of rubber, and a plurality of tooth-shaped protrusions are provided on the surface of the protective sleeve 2, and the protrusions are elastic;

[0023] An abutting portion 3 is provided above the valve flap. A first inclined surface 31 is provided on the side surface of the abutting portion 3. A pressing component for pressing down the abutting portion 3 is provided on the valve body 11. There are a pair of pressing components and they are symmetrically arranged on both sides of the valve body 11. The pressing component includes a connecting portion 4 provided on the upper side wall of the valve body 11. A cavity 41 is opened in the connecting portion 4. A communication hole 40 is provided between the cavity 41 and the inside of the valve body 11. A pressing block 5 that can slide horizontally is provided in the cavity 41. Specifically, a sliding groove 411 is opened along the horizontal direction on the inner wall of the cavity 41. A slider 51 is provided on the side wall of the pressing block 5, and the slider 51 is slidably connected with the sliding groove 411. A second inclined surface 32 that can abut and cooperate with the first inclined surface 31 is provided at one end of the pressing block 5 facing the communication hole 40. A screw hole 42 is opened at one end of the connecting portion 4 away from the valve body 11. A screw rod 6 is inserted into the screw hole 42, and the screw rod 6 is rotatably connected with the pressing block 5. Further, an "L"-shaped handle 61 is provided at the outer end of the screw rod 6.

[0024] The principle of this embodiment is as follows: A detachable protective sleeve 2 is put on the valve flap to prevent the valve flap from being worn. When the protective sleeve 2 is damaged, it can be replaced, thus extending the service life of the valve flap. At the same time, the convex part can be mutually extruded with the valve seat 113, increasing the friction force and tension. After the convex part deforms, it rebounds and can fill the gap between the valve core 14 and the valve seat 113, so that the valve core 14 fits more closely with the valve seat 113.

[0025] A pressing component is provided to increase the downward pressure on the valve core 14 and reduce the situation where the valve flap bounces due to force. By rotating the screw 6 through the handle 61, the screw 6 rotates and displaces in the direction of the communication hole 40 through the thread, thereby driving the pressing block 5 to move horizontally and pass through the communication hole 40 into the valve body 11. The second inclined surface 32 of the pressing block 5 is in abutting cooperation with the first inclined surface 31 of the abutting part 3, thereby pressing the valve core 14 tightly downward to fit closely with the valve seat 113. Moreover, a pair of pressing components are provided to press the two sides of the valve core 14 simultaneously, so that the valve core 14 is evenly stressed and remains stable.

[0026] Embodiment Two:

[0027] This embodiment is further provided on the basis of Embodiment One. A hydraulic sensor 7 is provided on the side wall of the outflow channel 112; it also includes a controller 8 and a signal lamp 9, and the controller 8 is electrically connected to the hydraulic sensor 7 and the signal lamp 9.

[0028] The principle of this embodiment is as follows: After the valve body 11 is closed, the hydraulic sensor 7 is turned on. When the hydraulic sensor 7 detects that there is pressure generated by the medium flowing through the outflow channel 112, it transmits a signal to the controller 8, and the controller 8 controls the signal lamp 9 to light up, thereby reminding the staff to operate in time: increasing the downward pressure on the valve core 14 or replacing the protective sleeve 2, etc.

[0029] The hydraulic sensor 7, the controller 8 and the signal lamp 9 in this embodiment are all conventional devices well-known to those skilled in the art and purchased on the market. They can be customized or selected according to actual needs. In this patent, we only use them and do not improve their structures and functions. Their setting methods, installation methods and electrical connection methods can be debugged and operated by those skilled in the art as long as they are carried out according to the requirements of their user manuals. Therefore, they will not be elaborated here. Moreover, the hydraulic sensor 7, the controller 8 and the signal lamp 9 are all provided with control switches matching them, and the installation positions of the control switches are selected according to actual use needs to facilitate the operation and control of the operators.

[0030] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the technical principle of the present invention, several improvements and modifications can be made. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A low-temperature and high-pressure globe valve, comprising a valve body (11), a valve flap, and a valve stem (13). A valve cover (12) is connected above the valve body (11). An inflow channel (111), a valve seat (113), and an outflow channel (112) are provided inside the valve body (11). The upper end of the valve stem (13) passes through the valve cover (12) and is connected to a handwheel (15), characterized in that, A detachable protective sleeve (2) is sleeved on the lower end of the valve flap. An abutting portion (3) is provided above the valve flap. A first inclined surface (31) is provided on the side surface of the abutting portion (3). A pressing assembly for pressing down the abutting portion (3) is provided on the valve body (11). The pressing assembly includes a connecting portion (4) provided on the upper side wall of the valve body (11). A cavity (41) is formed in the connecting portion (4). A communication hole (40) is provided between the cavity (41) and the interior of the valve body (11). A pressing block (5) that can slide horizontally is provided in the cavity (41). A second inclined surface (32) capable of abutting and cooperating with the first inclined surface (31) is provided at one end of the pressing block (5) facing the communication hole (40). A screw hole (42) is formed at one end of the connecting portion (4) away from the valve body (11). A screw rod (6) is inserted into the screw hole (42). The screw rod (6) is rotatably connected to the pressing block (5).

2. The cryogenic high-pressure globe valve according to claim 1, wherein There are a pair of the pressing assemblies, which are symmetrically arranged on both sides of the valve body (11).

3. The cryogenic high-pressure globe valve according to claim 1, wherein, Several tooth-shaped protrusions are provided on the surface of the protective sleeve (2), and the protrusions are elastic.

4. A low-temperature and high-pressure stop valve according to claim 1, characterized in that, A hydraulic sensor (7) is provided on the side wall of the outflow channel (112); a controller (8) and a signal lamp (9) are further included.

5. A low-temperature and high-pressure globe valve according to claim 1, characterized in that, A sliding groove (411) is formed in the inner wall of the cavity (41) along the horizontal direction. A sliding block (51) is provided on the side wall of the pressing block (5). The sliding block (51) is slidably connected to the sliding groove (411).

6. The cryogenic high-pressure globe valve according to claim 1, characterized in that, An "L"-shaped handle (61) is provided at the outer end of the screw rod (6).

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