Diaphragm valve opening degree adjusting device and diaphragm valve

Abstract

The application discloses a diaphragm valve opening degree adjusting device and a diaphragm valve. One end of a connecting piece of the device is connected with a valve rod, and an adjusting channel is arranged in the connecting piece, and a limiting part is arranged in the adjusting channel. The adjusting device comprises an adjusting piece, a supporting piece and an elastic piece. A matching part matched with the limiting part is arranged on the adjusting piece. The supporting piece is fixedly connected with one end of the adjusting piece adjacent to the connecting piece and the valve rod. The elastic piece is arranged in the adjusting channel and between the matching part and the supporting piece. The diaphragm valve opening degree adjusting device can complete the adjustment of the diaphragm valve opening degree through a single operating tool, and is convenient and fast to operate.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of diaphragm valve opening degree adjustment, and more particularly, to a diaphragm valve opening degree adjustment device and a diaphragm valve. BACKGROUND

[0002] The opening and closing part of a pneumatic diaphragm valve is a diaphragm, which separates the lower valve body cavity from the upper cylinder cavity, so that the valve rod, valve flap and other parts located above the diaphragm are not corroded by the medium, and the medium is not leaked.

[0003] When it is necessary to adjust the valve opening degree of the pneumatic diaphragm valve online, two wrenches need to be used to apply force to the cylinder body, which is not convenient to operate.

[0004] Therefore, how to provide a device that can conveniently and quickly adjust the opening degree of the diaphragm valve has become a technical problem to be solved in the field. SUMMARY

[0005] An object of the present application is to provide a new technical solution for a device that can conveniently and quickly adjust the opening degree of the diaphragm valve.

[0006] According to a first aspect of the present application, a diaphragm valve opening degree adjustment device is provided.

[0007] The diaphragm valve opening degree adjustment device comprises a connecting piece and an adjustment mechanism; wherein,

[0008] One end of the connecting piece is connected to the valve rod, and an adjustment channel is provided in the connecting piece, and the adjustment channel has a limiting part;

[0009] The adjustment device comprises an adjustment piece, a support piece and an elastic piece, the adjustment piece is provided with a matching part matched with the limiting part, the support piece is fixedly connected to one end of the adjustment piece adjacent to the connecting piece and the valve rod, and the elastic piece is located in the adjustment channel and between the matching part and the support piece, so as to provide the adjustment piece with a force in the direction of the matching part.

[0010] Optionally, the end of the connecting piece connected to the valve rod is provided with an expansion gap.

[0011] Optionally, the connecting piece is threadedly connected to the valve rod, and the expansion gap penetrates the thread on the connecting piece.

[0012] Optionally, at least two expansion gaps are provided on the connecting piece, and the expansion gaps are uniformly distributed.

[0013] Optionally, the adjusting channel has an adjusting section, a connecting section and a limiting section, the adjusting section and the limiting section are respectively located at two ends of the connecting piece, the connecting section is in sliding fit with the adjusting piece, and the inner diameter of the connecting section is smaller than the adjusting section and the limiting section, and the connecting part of the limiting section and the connecting section forms the limiting part.

[0014] Optionally, the supporting piece has a circular truncated cone shape, and the outer diameter of the supporting piece gradually increases along the direction away from the limiting part.

[0015] Optionally, the adjusting device further comprises an elastic piece limiting piece, the elastic piece limiting piece is installed in the adjusting channel, and the elastic piece is in cooperation with the elastic piece limiting piece.

[0016] Optionally, the adjusting device further comprises an elastic piece lower supporting seat, the adjusting piece is provided with an elastic piece upper supporting part, the elastic piece is a spring, and two ends of the elastic piece are respectively in cooperation with the elastic piece lower supporting seat and the elastic piece upper supporting part.

[0017] According to the second aspect of the present application, a diaphragm valve is provided.

[0018] The diaphragm valve comprises a cylinder body, a limiting cover and the diaphragm valve opening adjusting device of the present application, the limiting cover is installed on the outer surface of the cylinder body, the limiting cover is provided with a sliding cavity, and the connecting piece is in sliding fit with the sliding cavity.

[0019] Optionally, the connecting piece is provided with a sliding protrusion, and the sliding protrusion is in sliding fit with the sliding cavity.

[0020] The connecting piece of the diaphragm valve opening adjusting device of the present application is supported by the supporting piece and presents an end expansion state, so that the connecting piece is locked with the valve rod. When the adjusting piece is subjected to an external force, the supporting piece can be driven to move out of the adjusting channel, so that the end connected with the valve rod of the connecting piece is restored to the original state from the expansion state, so that the position of the valve rod can be changed by adjusting the position of the connecting piece, and the adjustment of the diaphragm valve opening is realized. After the adjustment of the diaphragm valve opening is completed, the adjusting piece is driven to move by the elastic piece, so that the connecting piece presents the end expansion state again.

[0021] The diaphragm valve opening adjusting device of the present application can complete the adjustment of the diaphragm valve opening by a single operating tool, and the operation is convenient and fast.

[0022] Other features and advantages of the present application will become apparent from the following detailed description of exemplary embodiments thereof, taken in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0023] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the application and, together with the description, serve to explain the principles of the application.

[0024] Figure 1 Structure diagram of the diaphragm valve opening adjusting device embodiment of the present disclosure.

[0025] Figure 2 Sectional view of the diaphragm valve opening adjusting device embodiment of the present disclosure.

[0026] Figure 3 Structure diagram of the diaphragm valve embodiment of the present disclosure.

[0027] The figures are marked as follows:

[0028] Connecting piece-1, adjusting channel-11, adjusting section-111, connecting section-112, limiting section-113, expansion gap-12, sliding protrusion-13, adjusting piece-2, matching part-21, elastic piece upper support part-22, support piece-3, elastic piece-4, elastic piece limiting piece-5, elastic piece lower support seat-6, cylinder-7, limiting cover-8, sliding cavity-80, valve rod-9. DETAILED DESCRIPTION

[0029] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. Note that the relative arrangement, numerical expressions, and numerical values of the components and steps set forth in these embodiments are not limiting to the scope of the present application unless otherwise specifically stated.

[0030] The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the scope of the application its application or uses.

[0031] Techniques, methods, and apparatus known to those of ordinary skill in the relevant art can not be discussed in detail herein. However, where appropriate, such techniques, methods, and apparatus can be considered as part of the description of the present application.

[0032] In all of the compositions and methods shown and discussed herein, any specific values should be interpreted as merely exemplary, and are not intended to be limiting. Thus, other examples of the exemplary embodiments can have different values.

[0033] As Figure 1 and Figure 2 The diaphragm valve opening adjusting device of the present disclosure includes a connecting piece 1 and an adjusting mechanism, as shown in the figures.

[0034] One end of the connector 1 is connected to the valve stem, and the connector 1 has an adjustment channel 11. The connection between the connector 1 and the valve stem can be achieved by means of threaded connection or pin connection, etc. The connector 1 can drive or move the valve stem, thereby adjusting the opening degree of the diaphragm valve by adjusting the position of the valve stem. The adjustment channel 11 has a limiting part. The adjustment channel 11 usually extends along the length of the connector 1, and both ends of the adjustment channel 11 have openings. The limiting part can be, for example, a protrusion or a boss.

[0035] The adjusting device includes an adjusting member 2, a supporting member 3, and an elastic member 4. The adjusting member 2 is provided with a mating part 21 that cooperates with the limiting part. The cooperation between the mating part 21 and the limiting part can be, for example, a cooperation between a circumferential protrusion and a boss, or a snap-fit ​​cooperation. The adjusting member 2 can be limited within the adjusting channel 11 through the cooperation between the mating part 21 and the limiting part.

[0036] The support member 3 is fixedly connected to one end of the adjusting member 2 adjacent to the connecting member 1 and the valve stem. The fixed connection between the support member 3 and the adjusting member 2 can be achieved by threaded connection or integral molding.

[0037] The elastic element 4 is located within the adjustment channel 11 and between the mating part 21 and the support member 3, to provide a force to the adjustment member 2 in the direction of the mating part 21. The elastic element 4 may be, for example, a spring or a sheet. The elastic element 4 continuously provides a force to the adjustment member 2, so that the adjustment member 2 applies a force to the support member 3 in the direction of the adjustment channel 11 when no external force is applied.

[0038] The diaphragm valve opening adjustment device disclosed herein can have a locked state and an adjustment state.

[0039] In the locked state, the mating part 21 of the adjusting member 2 engages with the limiting part of the connecting member 1, and the support member 3 enters the end of the adjusting channel 11 of the connecting member 1 that engages with the valve stem. Under the support of the support member 3 on the inner wall of the adjusting channel 11, the end of the connecting member 1 expands, causing the connecting member 1 to lock with the valve stem. At this time, the opening degree of the diaphragm valve cannot be adjusted by adjusting the position of the connecting member 1.

[0040] In the adjustment state, the support member 3 is separated from the adjustment channel 11 of the connector 1, and the support member 3 does not apply force to the adjustment channel 11. The end of the connector 1 returns to its original state because it is not subjected to the force of the support member 3, allowing the connector 1 to move relative to the valve stem. By applying force to the connector 1, the valve stem is moved, thereby adjusting the opening degree of the diaphragm valve.

[0041] In practical use, a hex wrench can be inserted into the opening at the end of the adjustment channel 11 furthest from the support member 3. By applying a force towards the valve stem to the adjustment member 2 within the adjustment channel 11 using the hex wrench, the support member 3 can be pushed out of the adjustment channel 11, causing the diaphragm valve opening adjustment device to change from a locked state to an adjusting state. After the support member 3 is pushed out of the adjustment channel 11, the position of the connecting member 1 in the diaphragm valve can be adjusted using the hex wrench, thereby adjusting the opening of the diaphragm valve. After adjustment, the hex wrench is removed from the adjustment channel 11, and under the action of the elastic member 4, the diaphragm valve opening adjustment device changes from the adjusting state back to the locked state, the support member 3 re-enters the adjustment channel 11, and the connecting member 1 is locked to the valve stem again. Therefore, the diaphragm valve opening adjustment device of this disclosure can achieve opening adjustment using a single hex wrench.

[0042] The connecting member 1 of the diaphragm valve opening adjustment device disclosed herein is supported by the support member 3 and thus exhibits an enlarged end, locking the connecting member 1 to the valve stem. When the adjusting member 2 is subjected to external force, it can drive the support member 3 to disengage from the adjustment channel 11, causing the end of the connecting member 1 connected to the valve stem to return from the enlarged state to its original state. Therefore, the position of the valve stem can be changed by adjusting the position of the connecting member 1, thereby adjusting the diaphragm valve opening. After the diaphragm valve opening is adjusted, the adjusting member 2 is driven by the elastic member 4 to move the support member 3, causing the connecting member 1 to revert to its enlarged end state.

[0043] The diaphragm valve opening adjustment device disclosed herein can adjust the diaphragm valve opening with a single operating tool, making it convenient and quick to operate.

[0044] In one embodiment of the diaphragm valve opening adjustment device disclosed herein, an expansion notch 12 is provided at the end of the connector 1 that is connected to the valve stem. The expansion notch 12 enhances the deformation capacity of the end of the connector 1, thereby allowing the diaphragm valve opening to be adjusted with less force, thus improving the ease of use of the diaphragm valve opening adjustment device.

[0045] Furthermore, in order to more effectively enhance the deformation capacity of the end of the connector 1, the connector 1 is threaded to the valve stem, and the expansion notch 12 penetrates the thread on the connector 1.

[0046] Furthermore, in order to more effectively enhance the deformation capacity of the end of the connector 1, the connector 1 is provided with at least two expansion notches 12, and the expansion notches 12 are evenly distributed.

[0047] In practice, three evenly distributed expansion notches 12 can be provided on the connector 1.

[0048] In one embodiment of the diaphragm valve opening adjustment device disclosed herein, the adjustment channel 11 has an adjustment section 111, a connecting section 112, and a limiting section 113. The adjustment section 111 and the limiting section 113 are located at opposite ends of the connecting member 1. The connecting section 112 is slidably fitted with the adjusting member 2, and the inner diameter of the connecting section 112 is smaller than that of the adjustment section 111 and the limiting section 113. A limiting portion is formed at the connection between the limiting section 113 and the connecting section 112. A stepped surface is formed between the limiting section 113 and the connecting section 112 due to the change in inner diameter; this stepped surface is the limiting portion, and the mating portion of the adjusting member 2 can abut against this stepped surface.

[0049] In one embodiment of the diaphragm valve opening adjustment device disclosed herein, the support member 3 has a frustum shape, and the outer diameter of the support member 3 gradually increases in the direction away from the limiting portion. The outer surface of the support member 3 with this structure is an inclined surface that can serve as a guide, so that the support member 3 can enter or leave the adjustment channel 11 more smoothly.

[0050] In one embodiment of the diaphragm valve opening adjustment device disclosed herein, the adjustment device further includes an elastic element limiting member 5 to facilitate the confinement of the elastic element 4 within the adjustment channel 11. The elastic element limiting member 5 is installed within the adjustment channel 11, and the elastic element 4 cooperates with the elastic element limiting member 5. The elastic element limiting member 5 may, for example, be a retaining ring installed in a groove on the inner wall of the adjustment channel 11.

[0051] Furthermore, the adjustment device also includes a lower support seat 6 for the elastic element, and an upper support portion 22 for the elastic element is provided on the adjustment element 2. The elastic element 4 is a spring, and both ends of the elastic element 4 cooperate with the lower support seat 6 and the upper support portion 22 for the elastic element, respectively.

[0052] In practice, the two ends of the spring can be sleeved on the lower support seat 6 and the upper support part 22 of the elastic element to realize the installation of the elastic element 4 in the adjustment channel 11.

[0053] To more clearly illustrate the diaphragm valve opening adjustment device of this disclosure, the following will use... Figure 2 The following is an example of an embodiment shown in the figure:

[0054] The diaphragm valve opening adjustment device includes a connector 1 and an adjustment mechanism.

[0055] The connector 1 has an adjustment channel 11. The adjustment channel 11 has an adjustment section 111, a connecting section 112, and a limiting section 113. The adjustment section 111 and the limiting section 113 are located at opposite ends of the connector 1. The inner diameter of the connecting section 112 is smaller than that of the adjustment section 111 and the limiting section 113. The connection between the limiting section 113 and the connecting section 112 forms a limiting part. The inner hole of the adjustment section 111 is hexagonal, compatible with a hexagonal wrench. The limiting section 113 has threads for connection to the valve stem, and three evenly distributed expansion notches 12. All three expansion notches 12 penetrate the external threads on the limiting section 113.

[0056] The adjusting device includes an adjusting member 2, a supporting member 3, an elastic member 4, an elastic member limiting member 5, and an elastic member lower support seat 6. The adjusting member 2 is slidably fitted with the connecting section 112. The adjusting member 2 is provided with a mating part 21, which is an annular protrusion and can abut against the limiting part. An elastic member upper support part 22 is provided on the side of the mating part 21 facing the supporting member 3. The supporting member 3 is threadedly connected to one end of the adjusting member 2 near the valve stem. The supporting member 3 has a frustum shape, and the outer diameter of the supporting member 3 gradually increases in the direction away from the limiting part. The elastic member limiting member 5, which is a retaining ring structure, is installed in a groove on the inner wall of the adjusting channel 11. The elastic member lower support seat 6 is supported on the elastic member limiting member 5, and the elastic member lower support seat 6 is provided with an annular protrusion. The elastic member 4 is a spring, and its two ends are respectively sleeved on the annular protrusion of the elastic member lower support seat 6 and the elastic member upper support part 22.

[0057] In this embodiment, when in use, a hex wrench is first inserted into the adjusting section 111. At this time, the hex wrench can apply a force towards the valve stem to the adjusting member 2 in the adjusting channel 11. Under the action of the hex wrench, the adjusting member 2 moves along the adjusting channel 11, thereby pushing the support member 3 out of the adjusting channel 11. After the support member 3 is pushed out of the adjusting channel 11, the connecting member 1 can rotate relative to the valve stem. By applying force to the connecting member 1 with the hex wrench, the position of the connecting member 1 in the diaphragm valve is adjusted, and the position of the valve stem connected to the connecting member 1 is also adjusted, thereby achieving the purpose of adjusting the opening degree of the diaphragm valve.

[0058] After adjustment, the hex wrench is disengaged from the adjustment section 111. Under the elastic force of the elastic element 4, the adjustment element 2 moves along the adjustment channel 11 away from the valve stem, and the support element 3 re-enters the limiting section 113 of the adjustment channel 11. Under the action of the support element 3, the expansion notch 12 deforms, the limiting section 113 expands, and the connecting element 1 is locked to the valve stem.

[0059] like Figure 3As shown, this disclosure also provides a diaphragm valve, including a cylinder body 7, a limiting cover 8, and a diaphragm valve opening adjustment device of this disclosure. The limiting cover 8 is mounted on the outer surface of the cylinder body 7, and a sliding cavity 80 is provided inside the limiting cover 8. The connecting member 1 is slidably engaged with the sliding cavity 80.

[0060] In practice, a scale line may be provided on the outer surface of the end of the connector 1 away from the valve stem 9. This scale line may correspond to the adjusting section 111 and / or the connecting section 112, and the scale line may protrude from the limiting cover 8. In this way, the position of the connector 1 can be obtained according to the scale line, thereby determining the opening degree of the diaphragm valve.

[0061] In one embodiment of the diaphragm valve disclosed herein, the connector 1 is provided with a sliding protrusion 13, which slides in engagement with the sliding cavity 80. The sliding protrusion 13 helps to limit the connector 1 within the limiting cover 8, thereby improving the safety and stability of the diaphragm valve in use.

[0062] While specific embodiments of the invention have been described in detail by way of examples, those skilled in the art should understand that the examples are for illustrative purposes only and not intended to limit the scope of the invention. Those skilled in the art should understand that modifications can be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.

Claims

1. A diaphragm valve opening adjustment device, characterized in that, Includes connectors and adjustment mechanisms; among which, One end of the connector is connected to the valve stem, and the connector has an adjustment channel, which has a limiting part. The adjusting device includes an adjusting member, a supporting member, and an elastic member. The adjusting member has a mating part that cooperates with the limiting part. The supporting member is fixedly connected to one end of the adjusting member that is adjacent to the connecting member and the valve stem. The elastic member is located in the adjusting channel and between the mating part and the supporting member, so as to provide the adjusting member with a force in the direction of the mating part. The end of the connector that connects to the valve stem is provided with an expansion notch; The adjustment channel has an adjustment section, a connecting section, and a limiting section. The adjustment section and the limiting section are located at both ends of the connector. The connecting section slides with the adjustment section, and the inner diameter of the connecting section is smaller than that of the adjustment section and the limiting section. The connection between the limiting section and the connecting section forms the limiting part.

2. The diaphragm valve opening adjustment device according to claim 1, characterized in that, The connector is threaded to the valve stem, and the expansion notch penetrates the thread on the connector.

3. The diaphragm valve opening adjustment device according to claim 1, characterized in that, The connector is provided with at least two expansion notches, and the expansion notches are evenly distributed.

4. The diaphragm valve opening adjustment device according to claim 1, characterized in that, The support member has a frustum shape, and the outer diameter of the support member gradually increases in the direction away from the limiting portion.

5. The diaphragm valve opening adjustment device according to any one of claims 1 to 4, characterized in that, The adjustment device further includes an elastic element limiting member, which is installed in the adjustment channel, and the elastic element cooperates with the elastic element limiting member.

6. The diaphragm valve opening adjustment device according to claim 5, characterized in that, The adjusting device further includes a lower support seat for the elastic element, and the adjusting element is provided with an upper support portion for the elastic element. The elastic element is a spring, and both ends of the elastic element cooperate with the lower support seat for the elastic element and the upper support portion for the elastic element, respectively.

7. A diaphragm valve, characterized in that, The device includes a cylinder body, a limiting cover, and a diaphragm valve opening adjustment device according to any one of claims 1 to 6. The limiting cover is installed on the outer surface of the cylinder body, and a sliding cavity is provided inside the limiting cover. The connecting member is slidably engaged with the sliding cavity.

8. The diaphragm valve according to claim 7, characterized in that, The connector is provided with a sliding protrusion, which slides in conjunction with the sliding cavity.

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