External valve position detection descaling valve

Abstract

The utility model provides an external valve position detection descaling valve which comprises a valve seat and a valve element, and the valve element can be vertically and movably arranged in the valve seat in a penetrating mode. A valve position detection device is arranged at the top of the valve seat, the top of the valve element is located outside the valve seat, and a detection head corresponding to the valve position detection device is arranged at the top of the valve element. According to the external valve position detection descaling valve, an operator can visually observe the opening and closing states of the valve conveniently, and the efficiency and reliability of maintenance work can be improved.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, and in particular to an external valve position detection descaling valve. Background Technology

[0002] High-pressure water descaling is a common hot-rolling descaling process used in the steel industry. Low-pressure descaling water is pressurized by a high-pressure pump in the descaling system to form high-pressure water, which is then sprayed onto the surface of the red-hot steel billet at a certain frequency to remove the oxide scale. The precision with which the high-pressure water is sprayed onto the billet surface directly affects the descaling effect. The descaling valve, as the control hub of the system, directly controls the high-pressure water and plays a crucial role in the descaling system. Currently, the most common descaling valve is the plunger-type descaling valve; however, it cannot directly determine the valve's open or closed state. Another type of descaling valve has a built-in detection device, but this structure is cumbersome to maintain, and the valve's open or closed state cannot be directly observed. If the detection device malfunctions, the valve's open or closed state cannot be determined.

[0003] Therefore, there is a need to provide an improved technical solution that addresses the shortcomings of the existing technology. Utility Model Content

[0004] The purpose of this utility model is to provide an external valve position detection descaling valve, which allows operators to intuitively observe the valve's opening and closing status and improves the efficiency and reliability of maintenance work.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] An external valve position detection descaling valve includes a valve seat and a valve core, the valve core being vertically movable and inserted into the valve seat; a valve position detection device is provided on the top of the valve seat, the top of the valve core is located outside the valve seat, and a detection head corresponding to the valve position detection device is provided on the top of the valve core.

[0007] According to one embodiment of the present invention, the valve position detection device and the top of the valve core are provided with protective covers, and the valve position detection device is connected to a display device.

[0008] According to one embodiment of the present invention, the valve core includes a plunger, a connecting disc, and a connecting rod connected sequentially from bottom to top; the valve seat includes a valve body, a cylinder, and a valve cover connected sequentially from bottom to top.

[0009] The plunger has an axial inlet and a radial outlet at its bottom end; the valve body has an inlet chamber and an outlet chamber, with a connecting chamber between them; the bottom end of the plunger passes through the connecting chamber.

[0010] The plunger has a piston in the middle, and the outer end of the piston slidably abuts against the inner wall of the cylinder; the piston divides the inner cavity of the cylinder into an upper cavity and a lower cavity, and the valve seat has air passages corresponding to the upper cavity and the lower cavity;

[0011] The plunger has an inner hole at the top, and the connecting plate is located inside the inner hole; the bottom end of the connecting rod is fixedly connected to the connecting plate, the top of the connecting rod passes through the valve cover, and the end is located outside the valve cover; the detection head is located at the top of the connecting rod.

[0012] According to one embodiment of the present invention, the plunger is provided with a water channel extending along the axial direction of the plunger, and the water channel is connected to the water inlet; the valve cover is provided with a balance chamber, and the connecting plate is provided with a water passage hole, which connects the balance chamber and the water channel.

[0013] According to one embodiment of the present invention, the inner wall of the inner hole is provided with an annular keyway, and an inner retaining key is provided in the keyway; the inner retaining key protrudes from the keyway, and the bottom surface of the inner retaining key abuts against the top surface of the connecting plate.

[0014] According to one embodiment of the present invention, a keycap is provided on the top of the connecting plate, and the keycap is fixedly connected to the connecting plate by bolts; the edge of the keycap is provided with a horizontally extending brim, and the brim abuts against the top surface of the inner key.

[0015] According to one embodiment of the present invention, a guide seat is fixedly provided on the bottom surface of the valve cover, and the connecting rod passes through the guide seat.

[0016] According to one embodiment of the present invention, the air passage connected to the upper cavity is disposed inside the valve cover, and the air passage connected to the lower cavity is disposed inside the valve body.

[0017] According to one embodiment of the present invention, the valve body and the plunger, the cylinder and the piston, the valve cover and the plunger, and the valve cover and the connecting rod are all slidably sealed together by sealing rings.

[0018] According to one embodiment of the present invention, the plunger has an outwardly protruding stepped portion in the middle, and an inwardly recessed groove portion above the stepped portion, with an external locking key inside the groove portion; the bottom of the piston abuts against the stepped portion, and the top of the piston abuts against the external locking key.

[0019] Compared with the prior art, the advantages and beneficial effects of the embodiments of this utility model are as follows:

[0020] The external valve position detection descaling valve provided in this embodiment operates by vertically moving the valve core to open and close the valve seat. Since the top of the valve core is located outside the top of the valve seat, the position of the detection head at the top of the valve core can be detected by the valve position detection device. This position information is then output as a signal to a display device, such as an indicator light or display screen, allowing the operator to visually observe the opening and closing status of the descaling valve. Even if the valve position detection device malfunctions, the operator can still directly observe the external detection head and determine the opening and closing status of the descaling valve based on its height. Furthermore, by placing the valve position detection device outside the valve seat, the external valve position detection descaling valve facilitates maintenance of the device, significantly improving the efficiency and reliability of maintenance work. Attached Figure Description

[0021] The accompanying drawings, which form part of this specification, are used to provide a further understanding of this utility model. The illustrative embodiments of this utility model and their descriptions are used to explain this utility model and do not constitute an undue limitation of this utility model. Wherein:

[0022] Figure 1 A schematic diagram of the structure of the external valve position detection descaling valve provided in this embodiment of the utility model;

[0023] Figure 2 A schematic diagram of the valve core of the external valve position detection descaling valve provided in this embodiment of the utility model;

[0024] Figure 3 A schematic diagram of the valve cover of the external valve position detection descaling valve provided in this embodiment of the utility model.

[0025] Explanation of reference numerals in the attached figures:

[0026] 1. Valve seat; 11. Valve body; 111. Inlet chamber; 112. Outlet chamber; 113. Connecting chamber; 12. Cylinder; 13. Valve cover; 131. Balance chamber; 14. Air passage; 15. Connecting bolt; 2. Valve core; 21. Piston; 211. Inlet; 212. Outlet; 213. Inner hole; 214. Water passage; 215. Keyway; 216. Stepped part; 217. Groove part; 22. Connecting plate; 221. Water passage hole; 23. Connecting rod; 24. Piston; 3. Valve position detection device; 31. Detection head; 4. Protective cover; 5. Inner locking key; 6. Key cap; 61. Cap brim; 7. Guide seat; 8. Outer locking key; 9. Sealing ring. Detailed Implementation

[0027] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. Various examples are provided by way of explanation of the present invention and not by way of limitation. In fact, those skilled in the art will recognize that modifications and variations can be made to the present invention without departing from the scope or spirit of the invention. For example, a feature shown or described as part of one embodiment may be used in another embodiment to produce yet another embodiment. Therefore, it is desirable that the present invention encompass such modifications and variations that fall within the scope of the appended claims and their equivalents.

[0028] In the description of this utility model, the terms "first," "second," and similar words do not indicate any order, quantity, or importance, but are only used to distinguish different components. Words such as "comprising" or "including" mean that the element or object preceding the word covers the element or object listed after the word and its equivalents, without excluding other elements or objects. Terms such as "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," and "bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and do not require that this utility model be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this utility model. The terms "connected," "linked," and "set up" used in this utility model should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; a direct connection or an indirect connection through intermediate components; a wired connection, a radio connection, or a wireless communication signal connection. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0029] like Figure 1 , Figure 3 As shown, this embodiment of the present invention provides an external valve position detection descaling valve, including a valve seat 1 and a valve core 2, the valve core 2 being vertically movable and passing through the valve seat 1. For clarity, the following definitions are provided. Figure 1 The top part is "up" and the bottom part is "down". The valve seat 1 is equipped with a valve position detection device 3 on its top. The top of the valve core 2 is located outside the valve seat 1, and the top of the valve core 2 is equipped with a detection head 31 corresponding to the valve position detection device 3.

[0030] The external valve position detection descaling valve provided in this embodiment operates by vertically moving the valve core 2 to open and close the valve seat 1. Since the top of the valve core 2 is located outside the top of the valve seat 1, the position of the detection head 31 at the top of the valve core 2 can be detected by the valve position detection device 3. This position information of the detection head 31 is then output as a signal to a display device (not shown in the figure), such as an indicator light or display screen, allowing the operator to visually observe the opening and closing status of the descaling valve. Even if the valve position detection device 3 malfunctions, the operator can still directly observe the external detection head 31 and determine the opening and closing status of the descaling valve by its height position. Furthermore, by placing the valve position detection device 3 outside the valve seat 1, the external valve position detection descaling valve provided in this embodiment facilitates the maintenance of the valve position detection device 3, significantly improving the efficiency and reliability of maintenance work.

[0031] like Figure 1 , Figure 3 As shown, in order to protect the valve position detection device 3 and prevent contaminants from entering the valve seat 1 through the gap between the valve core 2 and the valve seat 1, in one embodiment of this utility model, a protective cover 4 is provided on the top of the valve position detection device 3 and the valve core 2, covering the top of the valve core 2 and the valve position detection device 3 inside. To directly observe the opening and closing status of the descaling valve, the protective cover 4 can be transparent, or the valve position detection device 3 can be connected to a display device (not shown in the figure), with the display device located outside the protective cover 4.

[0032] Existing plunger-type descaling valves have slender stems, resulting in a long overall valve length. This makes it difficult to ensure coaxiality, leads to significant wear on the elastic seal, and results in numerous parts and mating surfaces, increasing cumulative errors and limiting the valve's service life. To address these issues, such as... Figure 1 , Figure 2As shown, in one embodiment of this utility model, the valve core 2 includes a plunger 21, a connecting plate 22, and a connecting rod 23 connected sequentially from bottom to top. The valve seat 1 includes a valve body 11, a cylinder 12, and a valve cover 13 connected sequentially from bottom to top. The plunger 21 has an axial inlet 211 and a radial outlet 212 at its bottom end, which are connected internally within the plunger 21. The valve body 11 has an inlet chamber 111 and an outlet chamber 112, with a connecting cavity 113 between them. The bottom end of the plunger 21 passes through the connecting cavity 113. The up-and-down movement of the plunger 21 realizes the opening and closing of the valve. The position of the outlet 212 determines the connection or disconnection between the valve inlet chamber 111 and the outlet chamber 112, i.e., the valve is open when the outlet 212 is connected to the outlet chamber 112; otherwise, the valve is closed. The plunger 21 has a piston 24 in its middle, and the outer end of the piston 24 slidably abuts against the inner wall of the cylinder 12. The piston 24 divides the inner cavity of the cylinder 12 into an upper chamber and a lower chamber, and the valve seat 1 has an air passage 14 corresponding to the upper and lower chambers. By supplying air to the upper or lower chamber, the piston 24 can drive the plunger 21 to move downward or upward. The top of the plunger 21 has an inner hole 213, and the connecting plate 22 is located inside the inner hole 213. The bottom end of the connecting rod 23 is fixedly connected to the connecting plate 22, the top of the connecting rod 23 passes through the valve cover 13, and the end is located outside the valve cover 13. The detection head 31 is located at the top of the connecting rod 23. In this embodiment, the valve core 2 is divided into two parts in the length direction: the connecting rod 23 and the plunger 21, which reduces the length of each component and makes it easier to ensure concentricity during movement. The connecting rod 23 is fixedly connected to the plunger 21 by a connecting plate 22, which is located inside the inner hole 213 at the top of the plunger 21. This further solves the problem that the concentricity is difficult to guarantee due to the excessive length of the valve core 2. In addition, the outer end of the piston 24 in the middle of the plunger 21 abuts against the inner wall of the cylinder 12, which can also ensure the concentricity of the plunger 21 during movement to a certain extent.

[0033] When the plunger 21 moves, to prevent positive and negative pressures caused by volume changes in the cavity between the connecting disc 22 and the valve cover 13 from affecting the movement of the plunger 21, such as... Figure 1 , Figure 2As shown, in one embodiment of this utility model, the plunger 21 has a water channel 214 extending axially along the plunger 21, and the water channel 214 is connected to the water inlet 211. The valve cover 13 has a balance chamber 131, and the valve cover 13 and the connecting plate 22 form a closed balance chamber 131. The connecting plate 22 has a water passage hole 221, which connects the balance chamber 131 and the water channel 214. Specifically, when the plunger 21 moves upward, the medium enters the balance chamber 131 through the water channel 214. The hydraulic pressure in the water channel 214 of the plunger 21 is greater than the hydraulic pressure in the balance chamber 131. As the driving force of the gas supply on the piston 24 increases, the plunger 21 moves upward and opens the valve. When the plunger 21 moves downward, the hydraulic pressure in the water channel 214 of the plunger 21 is greater than the hydraulic pressure in the balance chamber 131. As the driving force of the gas supply on the piston 24 increases, it overcomes part of the hydraulic pressure in the water channel 214, and the plunger 21 moves downward and closes the valve. When the valve is open, compressed air enters the lower chamber through the air passage 14, and the air in the upper chamber enters the atmosphere through the air passage 14. The compressed air in the cylinder 12 acts on the piston 24, generating maximum thrust, causing the plunger 21 to move upward and the valve to open. When the valve is closed, compressed air enters the upper chamber through the air passage 14, and the air in the lower chamber enters the atmosphere through the air passage 14. The compressed air in the cylinder 12 acts on the piston 24, generating maximum thrust, causing the plunger 21 to move downward and the valve to close.

[0034] like Figure 2 As shown, in one embodiment of this utility model, the inner wall of the inner hole 213 is provided with an annular keyway 215, and an inner retaining key 5 is provided in the keyway 215. The inner retaining key 5 protrudes from the keyway 215, and the bottom surface of the inner retaining key 5 abuts against the top surface of the connecting plate 22. Further, in order to improve the stability of the connection, a keycap 6 is provided on the top of the connecting plate 22, and the keycap 6 is fixedly connected to the connecting plate 22 by bolts. The edge of the keycap 6 is provided with a horizontally extending brim 61, and the brim 61 abuts against the top surface of the inner retaining key 5.

[0035] To further improve the stability and concentricity of linkage 23 during movement, such as Figure 1 , Figure 3 As shown, in one embodiment of this utility model, a guide seat 7 is fixedly provided on the bottom surface of the valve cover 13, and the connecting rod 23 passes through the guide seat 7. In this embodiment, the guide seat 7 limits and guides the movement of the connecting rod 23, so that it maintains stability and concentricity when moving.

[0036] like Figure 1 As shown, in one embodiment of the present invention, the air passage 14 connected to the upper cavity is disposed inside the valve cover 13, and the air passage 14 connected to the lower cavity is disposed inside the valve body 11.

[0037] like Figure 2As shown, in one embodiment of this utility model, the plunger 21 has an outwardly protruding stepped portion 216 in the middle, and an inwardly recessed groove portion 217 is provided above the stepped portion 216. An external locking key 8 is provided in the groove portion 217. The bottom of the piston 24 abuts against the stepped portion 216, and the top of the piston 24 abuts against the external locking key 8.

[0038] like Figure 1 As shown, in one embodiment of this utility model, the valve body 11 and the plunger 21, the cylinder 12 and the piston 24, the valve cover 13 and the plunger 21, and the valve cover 13 and the connecting rod 23 are all slidably sealed together by sealing rings 9. Furthermore, the plunger 21 is chamfered to reduce damage to the sealing ring 9 and enhance the accuracy of pressure regulation. Furthermore, the guide seat 7 is chamfered to reduce damage to the sealing ring 9.

[0039] like Figure 2 As shown, in order to achieve the connection between the connecting rod 23 and the connecting plate 22, in one embodiment of the present invention, the lower end of the connecting rod 23 is provided with a thread, which is connected to the threaded hole in the middle of the connecting plate 22 and welded at the connection point.

[0040] like Figure 1 As shown, in order to assemble the valve body 11, cylinder 12 and valve cover 13 into valve seat 1, the valve cover 13 has a plurality of cylindrical holes evenly distributed, and the valve body 11 has corresponding threaded holes, which are connected by connecting bolts 15.

[0041] The above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An externally valving, position-sensing descaling valve characterized by, It includes valve seat (1) and valve core (2), the valve core (2) is vertically mobilely threaded in the valve seat (1);The top of the valve seat (1) is provided with valve position detection device (3), the top of the valve core (2) is located outside the valve seat (1), and the top of the valve core (2) is provided with detection head (31) corresponding to the valve position detection device (3); The valve core (2) includes plunger (21), connecting disc (22) and connecting rod (23) connected in sequence from bottom to top;The valve seat (1) includes valve body (11), cylinder (12) and valve cover (13) connected in sequence from bottom to top; The bottom end of the plunger (21) is provided with axial water inlet (211) and radial water outlet (212);The valve body (11) is provided with water inlet cavity (111) and water outlet cavity (112), and a connecting cavity (113) is arranged between the two;The bottom end of the plunger (21) is threaded in the connecting cavity (113). The middle part of the plunger (21) is provided with piston (24), and the outer end of the piston (24) is slidably abutted with the inner wall of the cylinder (12);The piston (24) divides the inner cavity of the cylinder (12) into upper cavity and lower cavity, and the valve seat (1) is provided with air passage (14) corresponding to the upper cavity and the lower cavity; The top of the plunger (21) is provided with inner hole (213), and the connecting disc (22) is arranged inside the inner hole (213);The bottom end of the connecting rod (23) is fixedly connected with the connecting disc (22), the top of the connecting rod (23) penetrates the valve cover (13), and the end is located outside the valve cover (13), and the detection head (31) is arranged at the top end of the connecting rod (23).

2. The externally valving, scale removal valve of claim 1, wherein, The valve position detection device (3) and the top of the valve core (2) are provided with protective cover (4), and the valve position detection device (3) is connected with display device.

3. The externally valving, scale removal valve of claim 1, wherein, The plunger (21) is provided with water channel (214) extending along the axial direction of the plunger (21), and the water channel (214) is connected with the water inlet (211);The valve cover (13) is provided with balance cavity (131), and the connecting disc (22) is provided with water through hole (221), and the water through hole (221) communicates the balance cavity (131) and the water channel (214).

4. The external valve position detection descaling valve according to claim 1, characterized by The inner wall of the inner hole (213) is provided with annular key groove (215), and the inner key (5) is arranged in the key groove (215);The inner key (5) protrudes from the key groove (215), and the bottom surface of the inner key (5) abuts against the top surface of the connecting disc (22).

5. The externally valving, position-sensing descaling valve of claim 4, wherein, The top of the connecting disc (22) is provided with key cap (6), and the key cap (6) is fixedly connected with the connecting disc (22) by bolts;The edge of the key cap (6) is provided with horizontally extending brim (61), and the brim (61) abuts against the top surface of the inner key (5).

6. The externally valving, position-sensing descaling valve of claim 1, wherein, The bottom surface of the valve cover (13) is fixedly provided with guide seat (7), and the connecting rod (23) is threaded in the guide seat (7).

7. The externally valving, position-sensing descaling valve of claim 1, wherein, The air passage (14) connected with the upper cavity is arranged in the valve cover (13), and the air passage (14) connected with the lower cavity is arranged in the valve body (11).

8. The externally valving, position-sensing descaling valve of claim 1, wherein, The valve body (11) and the plunger (21), the cylinder (12) and the piston (24), the valve cover (13) and the plunger (21), the valve cover (13) and the connecting rod (23) are all connected by the sealing ring (9) sliding seal.

9. The externally valving, position-sensing descaling valve of claim 1, wherein, The middle part of the plunger (21) is provided with a outwardly protruding step part (216), the upper part of the step part (216) is provided with an inwardly recessed groove part (217), and the groove part (217) is provided with an outer clamping key (8); the bottom of the piston (24) is in abutment with the step part (216), and the top of the piston (24) is in abutment with the outer clamping key (8).

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