Slide valve stroke limiting device and slide valve

Abstract

A sliding plate valve stroke limiting device and a sliding plate valve, the sliding plate valve stroke limiting device comprises a limiting gland member and a limiting connecting shaft, the limiting gland member is detachably connected on a valve body, and the relative position of the limiting gland member and the valve body can be adjusted according to actual needs, the limiting gland member and the valve body are detachably connected to form a limiting cavity, the limiting connecting shaft is partially inserted into the limiting cavity and connected with a valve rod, and is used for enabling the movable stroke of the valve rod to be within the range of the limiting cavity under the driving action of external force, and the sliding plate valve comprises the above sliding plate valve stroke limiting device. The sliding plate valve stroke limiting device and the sliding plate valve can well control the stroke of the valve rod through the limiting gland member and the limiting connecting shaft, and reduce the operation difficulty of stroke control.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, and in particular to a slide valve stroke limit device and a slide valve. Background Technology

[0002] Traditional electric valves typically achieve stroke limits through mechanical adjustment, with the mechanical limit screw usually mounted on the valve's gearbox. Adjustment requires using a tool to loosen the gearbox screw, then manually rotating the valve to the desired opening position. After adjustment, the mechanical limit screw is then secured to the gearbox to ensure the valve stops when the limit is reached. This process is complex and inconvenient. Utility Model Content

[0003] In view of this, the purpose of this utility model is to provide a slide valve stroke limiting device and a slide valve, which can effectively control the stroke of the valve stem through the pressure cap component and the limiting coupling, thereby reducing the difficulty of stroke control operation.

[0004] This utility model provides a sliding valve stroke limiting device, including a limiting cover component and a limiting coupling shaft. The limiting cover component is detachably connected to the valve body, and the relative position of the limiting cover component and the valve body can be adjusted according to actual needs. After the limiting cover component is detachably connected to the valve body, a limiting cavity is formed. The limiting coupling shaft part passes through the limiting cavity and is connected to the valve stem, so that the movement stroke of the valve stem is within the range of the limiting cavity under the driving action of external force.

[0005] In one embodiment, the limiting cover component includes a limiting cover and a locking nut, both of which are threaded onto the valve body, with the locking nut tightly attached to the lower part of the limiting cover. The limiting coupling portion passes through the limiting cover and is connected to the valve stem.

[0006] In one embodiment, the limiting coupling includes a shaft and a limiting block. The shaft is connected to the valve stem through the limiting block, and the limiting block is located in the limiting cavity to cooperate with the limiting pressure cover member to limit the movement stroke of the valve stem.

[0007] In one embodiment, the shaft includes a movable section and a connecting section connected to each other. The limiting block is assembled on the movable section. When an insertion cavity with a preset depth is opened in the movable section, the limiting block is provided with an internal thread. The valve stem is threadedly connected to the internal thread of the limiting block and passes through the insertion cavity.

[0008] This utility model also provides a slide valve, including the slide valve stroke limiting device described in any one of the above claims, and further including a valve body, a valve stem, and a slide plate. The limiting gland component is detachably connected to the valve body, and the relative position of the limiting gland component and the valve body can be adjusted according to actual needs. After the limiting gland component is detachably connected to the valve body, it forms a limiting cavity. The limiting coupling portion passes through the limiting cavity and is connected to the valve stem, so that the movement stroke of the valve stem is within the range of the limiting cavity under the action of external force. The valve stem passes through the valve cavity of the valve body and is connected to the slide plate.

[0009] In one embodiment, the valve further includes a packing member assembled on the valve body, and a limiting gland member assembled on the packing member, with the valve stem passing through the packing member and into the valve cavity of the valve body.

[0010] In one embodiment, the packing component includes a stuffing box cover, a sealing ring, a sealing seat, and sealing packing. The stuffing box cover is assembled on the valve body to form a sealing box. The sealing ring, sealing seat, and sealing packing are all located inside the sealing box, and the sealing packing is located between the sealing ring and the sealing seat. The valve stem passes through the sealing ring, sealing packing, and sealing seat in sequence and is connected to the slide plate.

[0011] In one embodiment, the packing member further includes a spring located between the sealing seat and the sealing packing, and the valve stem passes through the spring.

[0012] The sliding valve stroke limiting device and sliding valve provided by this utility model can effectively control the stroke of the valve stem through the pressure cap component and the limiting coupling, reducing the difficulty of stroke control operation. Attached Figure Description

[0013] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 A schematic diagram of the slide valve stroke limiting device provided by this utility model.

[0015] Figure 2 A schematic diagram of the limiting coupling of the slide valve stroke limiting device provided by this utility model. Detailed Implementation

[0016] The specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are merely some, not all, of the embodiments of this utility model. Based on the description of this utility model, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this utility model.

[0017] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "set," "install," and "connect," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0018] The terms “upper,” “lower,” “left,” “right,” “front,” “back,” “top,” “bottom,” “inner,” and “outer,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are used only for the convenience of description and simplification, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0019] The terms “first,” “second,” “third,” etc., are used merely to distinguish elements with similar properties, not to indicate or imply relative importance or a specific order.

[0020] The terms “include,” “comprising,” or any other variation thereof are intended to cover non-exclusive inclusion, which includes not only the elements listed but also other elements not expressly listed.

[0021] Example 1

[0022] Please see Figure 1 The sliding plate valve stroke limiting device provided by this utility model includes a limiting cover component 2 and a limiting connecting shaft 1. The limiting cover component 2 is detachably connected to the valve body 3, and the relative position of the limiting cover component 2 and the valve body 3 can be adjusted according to actual needs. After the limiting cover component 2 and the valve body 3 are detachably connected, a limiting cavity is formed. The limiting connecting shaft 1 partially passes through the limiting cavity and is connected to the valve stem 4, so that the movement stroke of the valve stem 4 is within the range of the limiting cavity under the action of external force.

[0023] It is understandable that the dimension of the limiting cavity in the direction of movement of the valve stem 4, i.e., the depth of the limiting cavity, determines the stroke of the valve stem 4. During operation, the limiting coupling 1 is driven by an external force to move the valve stem 4 up or down. The limiting coupling 1 moves up or down within the range of the limiting cavity, which can adjust the relative position of the limiting gland component 2 and the valve body 3, thereby adjusting the depth of the limiting cavity. The depth of the limiting cavity determines the stroke of the limiting coupling 1, thereby limiting the stroke of the valve stem 4.

[0024] Please see Figure 1 In some embodiments, the limiting cover component 2 includes a limiting cover 201 and a locking nut 202. Both the limiting cover 201 and the locking nut 202 are threaded onto the valve body 3, and the locking nut 202 is tightly attached to the lower part of the limiting cover 201. The limiting coupling 1 part passes through the limiting cover 201 and is connected to the valve stem 4.

[0025] It is known that the locking nut 202 can be tightly attached to the lower part of the limiting cover 201 to improve the overall stability of the limiting cover 201. The limiting cover 201 and the locking nut 202 can be rotated in both forward and reverse directions to adjust the relative position of the limiting cover 101 and the valve body 3, thereby adjusting the depth of the limiting cavity. The limiting coupling 1 is connected to the valve stem 4. The section of the limiting coupling 1 located outside the limiting cavity can be connected to an actuator or some handles, which can be selected according to actual needs. The limiting cavity restricts the travel of the limiting coupling 1, thereby limiting the travel of the valve stem 4.

[0026] Please see Figure 2 In some embodiments, the limiting coupling 1 includes a shaft 101 and a limiting block 102. The shaft 101 is connected to the valve stem 4 through the limiting block 102, and the limiting block 102 is located in the limiting cavity and is used to cooperate with the limiting pressure cover member 2 to limit the movement stroke of the valve stem 4.

[0027] It is understandable that the size of the shaft 101 can be adapted to the size of the valve stem 4, and the size of the limiting block 102 can be adapted to the size of the limiting cavity. The limiting block 102 can move within the limiting cavity, and the limiting block 102 cannot extend out of the limiting cavity. The limiting block 102 cooperates with the limiting cavity to limit the travel of the shaft 101, thereby limiting the travel of the valve stem 4.

[0028] Please continue reading. Figure 2 In some embodiments, the shaft 101 includes a movable section 101b and a connecting section 101a connected to each other. The limiting block 102 is assembled on the movable section 101b. When an insertion cavity with a preset depth is opened in the movable section 101b, the limiting block 102 is provided with an internal thread. The valve stem 4 is threaded into the internal thread of the limiting block 102 and passes through the insertion cavity.

[0029] It is understandable that the relative position of the valve stem 4 and the limit block 102 can be adjusted to adjust the depth of the valve stem 4 inserted into the insertion cavity. This position adjustment is to adjust the initial state of the slide plate connected to the valve stem 4, that is, to adjust the initial opening degree of the slide plate. The size of the moving section 101b can be larger than the size of the connecting section 101a. The connecting section 101a can be connected to the actuator or handle, etc.

[0030] Example 2

[0031] Please see Figure 1 This embodiment provides a sliding plate valve, including the aforementioned sliding plate valve stroke limiting device, and also includes a valve body 3, a valve stem 4, and a sliding plate. The limiting cover component 2 is detachably connected to the valve body 3, and the relative position of the limiting cover component 2 and the valve body 3 can be adjusted according to actual needs. After the limiting cover component 2 and the valve body 3 are detachably connected, a limiting cavity is formed. The limiting connecting shaft 1 partially passes through the limiting cavity and is connected to the valve stem 4, so that under the action of external force, the movement stroke of the valve stem 4 is within the range of the limiting cavity. The valve stem 4 passes through the valve cavity of the valve body 3 and is connected to the sliding plate.

[0032] It is understood that the adjustment of the stroke of the valve stem 4 of the valve can be referred to the description in Embodiment 1.

[0033] Please continue reading. Figure 1 In some embodiments, the valve further includes a packing member 5, which is mounted on the valve body 3, and a limiting gland member 2 is mounted on the packing member 5. The valve stem 4 passes through the packing member 5 and enters the valve cavity of the valve body 3.

[0034] It is understandable that the limiting gland 201 can be threaded onto the outer wall of the packing member 5, and the packing member 5 can improve the sealing between the valve stem 4 and the valve body 3.

[0035] Please see Figure 1 In some embodiments, the packing component 5 includes a packing gland cover 505, a sealing ring 501, a sealing seat 504, and a sealing packing 502. The packing gland cover 505 is assembled on the valve body 3 to form a sealing gland. The sealing ring 501, the sealing seat 504, and the sealing packing 502 are all located inside the sealing gland, and the sealing packing 502 is located between the sealing ring 501 and the sealing seat 504. The valve stem 4 passes through the sealing ring 501, the sealing packing 502, and the sealing seat 504 in sequence and is connected to the slide plate.

[0036] Understandably, the stuffing box 505 can be threaded to the valve body 3, and the limiting gland 201 can be threaded to the stuffing box 505 to form a limiting cavity. The sealing seat 504 can be assembled inside the valve body 3. The assembly method can be that a stepped cavity is set at the upper end of the valve body 3, and the sealing seat 504 is placed in the stepped cavity. The sealing ring 501 can be an O-ring, and the sealing packing 502 can be V-type graphite packing, which can reduce the friction between the packing and the valve stem 4 and provide good sealing performance.

[0037] Please see Figure 1 In some embodiments, the packing component further includes a spring 503 located between the sealing seat 504 and the sealing packing 502, and the valve stem 4 passes through the spring 503.

[0038] Understandably, the spring 503 can improve the compactness of the sealing packing 502, thereby improving the sealing effect of the sealing packing 502.

[0039] As can be seen from the above description, the slide valve stroke limiting device and slide valve provided by this utility model can effectively control the stroke of the valve stem 4 through the pressure cap component 2 and the limiting coupling 1, thereby reducing the difficulty of stroke control operation.

[0040] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the appended claims.

Claims

1. A slide valve stroke limiting device, characterized in that, The device includes a limiting gland component and a limiting coupling. The limiting gland component is detachably connected to the valve body, and the relative position of the limiting gland component and the valve body can be adjusted according to actual needs. After the limiting gland component is detachably connected to the valve body, a limiting cavity is formed. The limiting coupling part passes through the limiting cavity and is connected to the valve stem, so that the movement stroke of the valve stem is within the range of the limiting cavity under the action of external force.

2. The slide valve stroke limiting device as described in claim 1, characterized in that, The limiting cover component includes a limiting cover and a locking nut. Both the limiting cover and the locking nut are threaded onto the valve body, and the locking nut is tightly attached to the lower part of the limiting cover. The limiting coupling part passes through the limiting cover and is connected to the valve stem.

3. The slide valve stroke limiting device as described in claim 1, characterized in that, The limiting coupling includes a shaft and a limiting block. The shaft is connected to the valve stem through the limiting block, and the limiting block is located in the limiting cavity to cooperate with the limiting cover component to limit the movement stroke of the valve stem.

4. The slide valve stroke limiting device as described in claim 3, characterized in that, The shaft includes a movable section and a connecting section that are connected to each other. The limiting block is assembled on the movable section. When an insertion cavity with a preset depth is opened in the movable section, the limiting block is provided with an internal thread. The valve stem is threaded into the internal thread of the limiting block and passes through the insertion cavity.

5. A slide valve, characterized in that, The sliding plate valve stroke limiting device according to any one of claims 1 to 4 further includes a valve body, a valve stem, and a sliding plate. The limiting cover component is detachably connected to the valve body, and the relative position of the limiting cover component and the valve body can be adjusted according to actual needs. After the limiting cover component is detachably connected to the valve body, a limiting cavity is formed. The limiting coupling part passes through the limiting cavity and is connected to the valve stem, so that the movement stroke of the valve stem is within the range of the limiting cavity under the driving action of external force. The valve stem passes through the valve cavity of the valve body and is connected to the sliding plate.

6. The slide valve as described in claim 5, characterized in that, The valve also includes a packing member, which is mounted on the valve body, and a limiting gland member is mounted on the packing member. The valve stem passes through the packing member and enters the valve cavity of the valve body.

7. The slide valve as described in claim 6, characterized in that, The packing component includes a stuffing box cover, a sealing ring, a sealing seat, and sealing packing. The stuffing box cover is assembled on the valve body to form a sealing box. The sealing ring, sealing seat, and sealing packing are all located inside the sealing box, and the sealing packing is located between the sealing ring and the sealing seat. The valve stem passes through the sealing ring, sealing packing, and sealing seat in sequence and is connected to the slide plate.

8. The slide valve as described in claim 7, characterized in that, The packing component also includes a spring located between the sealing seat and the sealing packing, and the valve stem passes through the spring.

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