Passage protection device and valve

Abstract

This utility model relates to the field of valve technology and discloses a channel protection device and a valve. The channel protection device includes a protective plate, a guide sleeve, a spring, a first abutment member, a second abutment member, a wedge, and a screw. The guide sleeve is fixed to the inner wall of the protective plate. The spring is disposed inside the guide sleeve, and the first and second abutment members are movably disposed inside the guide sleeve. A limiting part is provided on the distal end of the guide sleeve, and the second abutment member is configured to partially extend out of the guide sleeve by being limited by the limiting part. The protective plate has a threaded through hole arranged along the axial direction of the protective plate, and the screw passes through and is coupled in the threaded through hole. The first abutment member is pushed by the spring to abut against the wedge, and the wedge is pushed by the screw to move along the axial direction of the protective plate. The spring force is transmitted through the second abutment member, generating a continuous and uniform radial pressing force on the side wall of the valve cover cavity, ensuring that the protective plate and the valve cover end face remain in a gapless fit under transportation vibration environment, and completely preventing external impurities from entering the channel.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, specifically to a channel protection device and a valve. Background Technology

[0002] In the valve manufacturing industry, especially when it comes to precision valves, the protection of the valve's internal passage (i.e., the valve cavity) during painting, packaging, transportation, and storage is crucial. Once impurities enter the valve cavity, they can easily scratch the sealing surface, jam the valve core, or block the flow channel, leading to valve sealing failure, difficulty in opening and closing, or even loss of function, seriously affecting the product quality and reliability of the valve.

[0003] Currently, the commonly used valve cavity protection methods in the industry mainly include using foam plugs, plastic plugs, tape wrapping, or removable simple end caps. However, foam plugs, plastic plugs, or tape are prone to loosening, falling off, or being punctured during long-distance transportation or frequent handling, thus losing their protective function. In addition, simple end caps are often not accurately positioned or locked securely, making it difficult to guarantee the sealing performance. Utility Model Content

[0004] In view of this, the present invention provides a channel protection device and valve to solve the problems of easy damage to the simple end cap, inaccurate positioning, or insecure locking.

[0005] In a first aspect, this utility model provides a channel protection device, comprising:

[0006] The protective plate is disc-shaped.

[0007] A guide sleeve is fixed to the inner sidewall of the protective plate, and the guide sleeve is arranged radially along the protective plate; the guide sleeve is hollow inside, and the guide sleeve has a proximal end close to the center of the protective plate and a distal end away from the center of the protective plate;

[0008] A spring is disposed inside the guide sleeve;

[0009] The first abutment and the second abutment are movably disposed inside the guide sleeve, with the first abutment disposed at the proximal end and the second abutment disposed at the distal end.

[0010] The guide sleeve has a limiting part at its distal end, and the second abutting member is configured to extend partially out of the guide sleeve by being limited by the limiting part, and the portion of the second abutting member extending out of the guide sleeve is adapted to abut against the side wall of the valve cover cavity.

[0011] The device includes a wedge and a lead screw. The guard plate has a threaded through hole arranged along the axial direction of the guard plate, and the lead screw passes through and is coupled in the threaded through hole. The first abutting member is pushed by the spring to abut against the wedge, and the wedge is pushed by the lead screw to move along the axial direction of the guard plate.

[0012] When installing the channel protection device, the operator first aligns the protective plate with the valve cover channel inlet, ensuring the edge of the protective plate is parallel and flush with the valve cover end face. At this point, the guide sleeve, spring, first abutment, second abutment, and wedge are inside the valve cover channel, with the distal end of the guide sleeve extending outwards through the limiting part of the second abutment, initially contacting the inner wall of the valve cover cavity. Subsequently, rotating the operating end of the lead screw drives the lead screw to move outwards along the axial direction of the protective plate, simultaneously pushing the wedge towards... Figure 1 As the wedge moves to the right, it continuously presses against the first abutment, forcing the first abutment to compress the spring inside the guide sleeve. After being compressed, the spring generates a reverse elastic force, pushing the second abutment to move towards the distal end, causing the second abutment to protrude from the guide sleeve to abut against the side wall of the valve cover cavity, ultimately forming a tight mechanical lock with the side wall of the valve cover cavity.

[0013] When disassembling, rotate the lead screw in the opposite direction. The wedge block retracts and releases the pressure on the first abutment. The spring returns to its original position, reducing the thrust on the second abutment. The device can then easily detach from the valve cover.

[0014] In this structure, the spring thrust is transmitted through the second abutment, generating a continuous and uniform radial clamping force on the side wall of the valve cover cavity. This ensures that the protective plate and the valve cover end face remain in a gapless fit under transportation vibration conditions, completely preventing external impurities from entering the channel. The extension of the second abutment is controlled by a limiting part to prevent it from detaching from the guide sleeve. A single rotating screw action synchronously drives the wedge block to move axially, the spring to compress, and the double abutment to expand radially, achieving one-step locking and greatly simplifying the installation process.

[0015] In one alternative embodiment, the inner diameter of the distal end opening of the guide sleeve gradually decreases to form the limiting portion.

[0016] The inner diameter of the distal end opening of the guide sleeve gradually decreases until the inner diameter of the distal end opening of the guide sleeve is smaller than the diameter of the second abutment, so that the limiting part can limit the second abutment and prevent it from sliding out of the guide sleeve from the distal end opening of the guide sleeve.

[0017] In one alternative embodiment, the first abutment and the second abutment are spheres.

[0018] In one alternative embodiment, the guide sleeve is provided with two layers along the axial direction of the guard plate, and each guide sleeve is adapted to accommodate the spring, the first abutment, and the second abutment.

[0019] The structure features a double-layer guide sleeve along the axial direction of the protective plate. The second abutting members of the two guide sleeves are distributed axially along the side wall of the valve cover cavity, forming a double-point locking mechanism. When the spring in one guide sleeve fails due to fatigue, the other guide sleeve can still maintain the locking force, ensuring that the device does not fall off under sudden operating conditions.

[0020] In one alternative implementation, each layer is provided with at least two of the guide sleeves.

[0021] In one alternative embodiment, each layer is provided with three guide sleeves, which are equidistant from the center of the protective plate.

[0022] In one optional embodiment, the wedge block has two sloping surfaces around its periphery, and the connection between the two sloping surfaces is a stepped transition.

[0023] The two layers of guide sleeves correspond to the two slope surfaces respectively.

[0024] In one alternative embodiment, the channel protection device further includes a handle fixed to one end of the lead screw away from the wedge.

[0025] In one alternative embodiment, a rubber layer or a polyurethane layer is provided on the inner wall surface of the protective plate.

[0026] Secondly, this utility model also provides a valve, including a valve body and a valve cover, wherein the valve cover is connected to the valve body, and a channel protection device is installed at the inlet of the valve cover channel. Attached Figure Description

[0027] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the structure of a channel protection device according to an embodiment of the present utility model;

[0029] Figure 2 This is a physical diagram of a channel protection device according to an embodiment of the present utility model.

[0030] Explanation of reference numerals in the attached figures:

[0031] 1. Protective plate; 2. Guide sleeve; 3. Spring; 4. First abutment; 5. Second abutment; 6. Wedge; 7. Lead screw; 8. Handle; 9. Valve cover. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0033] In the valve manufacturing industry, especially when it comes to precision valves, the protection of the valve's internal passage (i.e., the valve cavity) during painting, packaging, transportation, and storage is crucial. Once impurities enter the valve cavity, they can easily scratch the sealing surface, jam the valve core, or block the flow channel, leading to valve sealing failure, difficulty in opening and closing, or even loss of function, seriously affecting the product quality and reliability of the valve.

[0034] Currently, the commonly used valve cavity protection methods in the industry mainly include using foam plugs, plastic plugs, tape wrapping, or removable simple end caps. However, foam plugs, plastic plugs, or tape are prone to loosening, falling off, or being punctured during long-distance transportation or frequent handling, thus losing their protective function. In addition, simple end caps are often not accurately positioned or locked securely, making it difficult to guarantee the sealing performance.

[0035] The following is combined Figure 1 The following describes embodiments of the present invention.

[0036] According to an embodiment of the present invention, a channel protection device is provided, comprising a guard plate 1, a guide sleeve 2, a spring 3, a first abutting member 4, a second abutting member 5, a wedge block 6, and a lead screw 7; the guard plate 1 is disc-shaped, the guide sleeve 2 is fixed to the inner wall of the guard plate 1, and the guide sleeve 2 is arranged radially along the guard plate 1; the guide sleeve 2 is hollow inside, and the guide sleeve 2 has a proximal end near the center of the guard plate 1 and a distal end away from the center of the guard plate 1; the spring 3 is disposed inside the guide sleeve 2, and the first abutting member 4 and the second abutting member 5 are movably disposed on the guide sleeve 2. Inside the sleeve 2, the first abutting member 4 is located at the proximal end, and the second abutting member 5 is located at the distal end; a limiting part is provided on the distal end of the guide sleeve 2, and the second abutting member 5 is configured to partially extend out of the guide sleeve 2 through the limiting part, and the part of the second abutting member 5 extending out of the guide sleeve 2 is suitable for abutting against the side wall of the valve cover 9 cavity; a threaded through hole is provided on the guard plate 1 along the axial direction of the guard plate 1, and the screw rod 7 passes through and is coupled in the threaded through hole; the first abutting member 4 is pushed by the spring 3 to abut against the wedge block 6, and the wedge block 6 is pushed by the screw rod 7 to move along the axial direction of the guard plate 1.

[0037] When installing the channel protection device, the operator first aligns the protective plate 1 with the inlet of the valve cover 9 channel, ensuring that the inner wall of the protective plate 1 is parallel and in contact with the end face of the valve cover 9. At this time, the guide sleeve 2, spring 3, first abutment 4, second abutment 5, and wedge 6 are located inside the valve cover 9 channel, and the distal end of the guide sleeve 2 extends outward through the second abutment 5 constrained by the limiting part, initially contacting the inner wall of the valve cover 9 cavity. Subsequently, the operating end of the screw 7 is rotated, driving the screw 7 to move outward along the axial direction of the protective plate 1, pushing the wedge 6 synchronously towards the valve cover 9. Figure 1 As the wedge 6 moves to the right, it continuously presses against the first abutting member 4, forcing the first abutting member 4 to compress the spring 3 inside the guide sleeve 2. After being compressed, the spring 3 generates a reverse elastic force, which further applies a thrust to the distal end of the guide sleeve 2 to the second abutting member 5, and finally forms a tight mechanical lock with the side wall of the valve cover 9 cavity.

[0038] When disassembling, rotate the lead screw 7 in the opposite direction, the wedge block 6 retracts and releases the pressure on the first abutment 4, the spring 3 resets and reduces the thrust on the second abutment 5, and the device can be easily detached from the valve cover 9.

[0039] In this structure, the thrust of spring 3 is transmitted through the second abutment 5, generating a continuous and uniform radial clamping force on the side wall of the valve cover 9 cavity. This ensures that the guard plate 1 and the end face of the valve cover 9 remain in close contact without gaps under transportation vibration conditions, completely isolating external impurities from entering the channel. The extension of the second abutment 5 is controlled by a limiting part to prevent it from detaching from the guide sleeve 2. The action of a single rotating screw 7 synchronously drives the wedge block 6 to move axially, the spring 3 to compress, and the double abutment to expand radially, achieving one-step locking and greatly simplifying the installation process.

[0040] In one embodiment, the first abutment 4 and the second abutment 5 are spheres. The inner diameter of the distal end opening of the guide sleeve 2 gradually decreases to form a limiting portion.

[0041] In the above structure, the inner diameter of the distal end opening of the guide sleeve 2 gradually decreases until the inner diameter of the distal end opening of the guide sleeve 2 is smaller than the diameter of the second abutment 5, so that the limiting part can limit the second abutment 5 and prevent it from sliding out of the guide sleeve 2 from the distal end opening of the guide sleeve 2.

[0042] In one embodiment, the guide sleeve 2 is provided with two layers in the axial direction of the guard plate 1, and each guide sleeve 2 is equipped with a spring 3, a first abutment 4, and a second abutment 5.

[0043] A double-layer guide sleeve 2 structure is provided axially on the guard plate 1. The second abutting parts 5 of the two guide sleeves 2 are distributed axially along the side wall of the valve cover 9 cavity, forming a double-point locking mechanism. When the spring 3 in one guide sleeve 2 fails due to fatigue, the other guide sleeve 2 can still maintain the locking force, ensuring that the device does not fall off under sudden working conditions. Among them, the outer guide sleeve 2 is directly fixed to the inner guide sleeve 2.

[0044] In one embodiment, each layer is provided with at least two guide sleeves 2. Specifically, each layer is provided with three guide sleeves 2, which are equidistant from the center of the protective plate 1.

[0045] When the three guide sleeves 2 are distributed at 120° equidistant from the center of the protective plate 1, the local stress concentration caused by single-point locking is eliminated.

[0046] In one embodiment, the wedge 6 has two sloping surfaces around its perimeter, and the connection between the two sloping surfaces is a stepped transition; the two guide sleeves 2 correspond to the two sloping surfaces respectively.

[0047] like Figure 1 As shown, the wedge has two sloping surfaces on its six sides. Figure 1 The left and right slopes are respectively designed to accommodate two layers of guide sleeves 2. Specifically, the left slope is fitted to the outer guide sleeve 2, and the right slope is fitted to the inner guide sleeve 2. The wedge block 6 is driven by the lead screw 7 to... Figure 1 When the wedge 6 moves to the right, both ramps of the wedge block 6 move to the right. Since the height of the ramps gradually decreases from the left to the right, the height of the ramp that abuts against the first abutting member 4 in the guide sleeve 2 gradually increases when the wedge 6 moves to the right. This causes the first abutting member 4 inside both layers of the guide sleeve 2 to be squeezed by the ramps and move towards the distal end of the guide sleeve 2, thereby compressing the spring 3 inside the guide sleeve 2 and increasing the thrust of the spring 3 on the second abutting member 5.

[0048] In one embodiment, the channel protection device further includes a handle 8, which is fixed to the end of the lead screw 7 away from the wedge 6.

[0049] By fixing a handle 8 to the end of the lead screw 7 away from the wedge block 6, the operator can easily rotate the lead screw 7.

[0050] In one embodiment, a rubber layer or a polyurethane layer is provided on the inner wall surface of the protective plate 1.

[0051] When the guard plate 1 is installed in close contact with the end face of the valve cover 9, the rubber layer or polyurethane layer on its inner wall directly contacts the metal surface of the valve cover 9. During the radial expansion of the second abutment member 5 driven by the tightening screw 7, the guard plate 1 is pushed by the reverse force, causing the rubber layer or polyurethane layer to undergo elastic compression deformation.

[0052] Figure 2 The image shown is a physical diagram of a channel protection device in this embodiment. In this structure, there are three guide sleeves 2, and only one sloping surface is provided around the wedge block 6.

[0053] According to an embodiment of the present invention, another aspect provides a valve, including a valve body and a valve cover 9, the valve cover 9 being connected to the valve body, and a channel protection device being installed at the channel inlet of the valve cover 9.

[0054] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A channel protection device, characterized in that, include: The protective plate (1) is disc-shaped; A guide sleeve (2) is fixed to the inner wall of the protective plate (1), and the guide sleeve (2) is arranged radially along the protective plate (1); the guide sleeve (2) is hollow inside, and the guide sleeve (2) has a proximal end close to the center of the protective plate (1) and a distal end far from the center of the protective plate (1); Spring (3) is disposed inside the guide sleeve (2); The first abutting member (4) and the second abutting member (5) are movably disposed inside the guide sleeve (2), with the first abutting member (4) disposed at the proximal end and the second abutting member (5) disposed at the distal end. The guide sleeve (2) has a limiting part on its distal end. The second abutting member (5) is configured to extend partially out of the guide sleeve (2) by being limited by the limiting part. The portion of the second abutting member (5) extending out of the guide sleeve (2) is adapted to abut against the side wall of the valve cover (9) cavity. The wedge (6) and the lead screw (7) are provided on the guard plate (1) and the threaded through hole is provided along the axial direction of the guard plate (1). The lead screw (7) passes through and is coupled in the threaded through hole. The first abutting member (4) is pushed by the spring (3) to abut against the wedge (6). The wedge (6) is pushed by the lead screw (7) to move along the axial direction of the guard plate (1).

2. The channel protection device according to claim 1, characterized in that, The inner diameter of the distal end opening of the guide sleeve (2) gradually decreases to form the limiting part.

3. The channel protection device according to claim 2, characterized in that, The first abutment (4) and the second abutment (5) are spheres.

4. The channel protection device according to any one of claims 1-3, characterized in that, Along the axial direction of the guard plate (1), the guide sleeve (2) is provided with two layers, and the spring (3), the first abutment (4), and the second abutment (5) are adapted to each of the guide sleeves (2).

5. The channel protection device according to claim 4, characterized in that, Each layer is provided with at least two of the aforementioned guide sleeves (2).

6. The channel protection device according to claim 5, characterized in that, Each layer is provided with three guide sleeves (2), and the three guide sleeves (2) are equidistant from the center of the guard plate (1).

7. The channel protection device according to claim 4, characterized in that, The wedge (6) has two sloping surfaces around its perimeter, and the connection between the two sloping surfaces is a stepped transition. The two layers of guide sleeves (2) correspond to the two slope surfaces respectively.

8. The channel protection device according to any one of claims 1-3, characterized in that, It also includes a handle (8), which is fixed to the end of the lead screw (7) away from the wedge (6).

9. The channel protection device according to any one of claims 1-3, characterized in that, The inner wall of the protective plate (1) is provided with a rubber layer or a polyurethane layer.

10. A valve, comprising a valve body and a valve cover (9), the valve cover (9) being connected to the valve body, characterized in that, A channel protection device as described in any one of claims 1–9 is installed at the inlet of the valve cover (9).

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