Diaphragm valve with filtering function

Abstract

The utility model discloses a diaphragm valve with a filtering function, which comprises a diaphragm valve body and a valve cover arranged at the upper end of the diaphragm valve body, a valve rod is arranged in the valve cover, a raised valve seat is arranged in the diaphragm valve body, a diaphragm valve diaphragm is arranged at the joint of the valve cover and the diaphragm valve body, and the diaphragm valve further comprises a filtering mechanism, a pushing seat and a pushing mechanism, a pushing seat is arranged at the lower end of the valve rod, a pushing mechanism is arranged at the lower end of the pushing seat, and the filtering mechanism is arranged in the inlet end of the diaphragm valve body. Through the arrangement of the filtering mechanism, impurities in fluid can be filtered out, the filter screen can move in the diaphragm valve body, the phenomenon that an external fluid pipeline is deformed or exploded due to the fact that the filter screen is blocked is avoided, and through the arrangement of the pushing mechanism, the diaphragm valve diaphragm can be pressed on the protruding valve seat; the sealing performance between the diaphragm and the valve seat of the diaphragm valve is further improved, and the sealing effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a diaphragm valve with a filtering function. Background Art

[0002] The structure of diaphragm valve is very different from that of general valves. It relies on soft rubber membrane or plastic membrane to control the movement of fluid. Commonly used diaphragm valve materials are divided into cast iron diaphragm valve, cast steel diaphragm valve, stainless steel diaphragm valve, and plastic diaphragm valve.

[0003] The diaphragm valve body in the prior art has a diaphragm valve handwheel installed on the top of the diaphragm valve body, and an inlet is provided on one side of the diaphragm valve body, and an outlet is provided on the other side of the diaphragm valve body, a protrusion is provided inside the diaphragm valve body, an inlet channel is provided on the side of the protrusion close to the inlet, and an outlet channel is provided on the side of the protrusion close to the outlet, a support rod is installed inside the diaphragm valve handwheel, a piston is provided at the lower end of the support rod, a plug-in block is provided at the lower end of the piston, a valve disc is provided below the plug-in block, and a diaphragm is provided at the lower end of the valve disc, and the diaphragm is closed or opened by pushing the diaphragm to contact or separate from the protrusion.

[0004] However, the diaphragm valve in the prior art does not have a filtering function and cannot filter impurities in the fluid. In addition, the prior art only supports the diaphragm with the lower end of the plug-in block so that the diaphragm contacts the protrusion, which also results in poor sealing performance between the diaphragm and the protrusion. Utility Model Content

[0005] The purpose of the utility model is to provide a diaphragm valve with a filtering function, so as to solve the above technical problems.

[0006] The technical solution adopted by the utility model is as follows:

[0007] A diaphragm valve with a filtering function comprises a diaphragm valve body and a valve cover arranged at the upper end of the diaphragm valve body, the valve cover is provided with the valve stem, the interior of the diaphragm valve body is provided with a raised valve seat, a diaphragm valve diaphragm is provided at the connection between the valve cover and the diaphragm valve body, and further comprises a filtering mechanism, a push seat and a pushing mechanism, the lower end of the valve stem is provided with the push seat, the lower end of the push seat is provided with the pushing mechanism, the filtering mechanism is arranged in the inlet end of the diaphragm valve body, wherein the filtering mechanism comprises:

[0008] An adjusting ring, wherein a limiting groove is provided on the inner wall of the inlet end of the diaphragm valve body, and the adjusting ring is arranged in the limiting groove;

[0009] An adjusting rod, one end of which is connected to the adjusting ring;

[0010] A sliding ring, the other end of the adjusting rod is provided with the sliding ring;

[0011] A filter screen, wherein the filter screen is arranged in the sliding ring;

[0012] A sliding bearing is provided in the middle of the filter screen and is sleeved on the outer edge of the adjusting rod.

[0013] Preferably, the outer wall of the sliding ring is slidably matched with the inner wall of the inlet end, and the outer diameter of the sliding ring is smaller than the inner diameter of the adjusting ring.

[0014] Preferably, an adjustment hole is provided in the middle of the other end of the adjustment rod.

[0015] Preferably, the outer circumferential wall of the adjustment ring is threadedly connected to the inner circumferential wall of the limiting groove.

[0016] Preferably, it further comprises a first spring, wherein the first spring is sleeved on the outer edge of the adjusting rod, one end of the first spring is against the sliding bearing, and the other end of the first spring is connected to the adjusting ring.

[0017] Preferably, it further comprises a screw nut, wherein the upper end of the valve cover is movably provided with the screw nut, the upper end of the valve stem passes through the screw nut and is threadedly connected with the screw nut, and the upper end of the screw nut is provided with a hand wheel.

[0018] Preferably, the pushing mechanism includes a pressure cover, a pressure plate and a guide rod, the valve stem is hollow, the pressure cover is located at the lower end of the push seat, the pressure plate is arranged inside the pressure cover, the guide rod is arranged at the upper end of the pressure plate, and the upper end of the guide rod passes through the pressure cover and is located inside the valve stem.

[0019] As a further preference, it further comprises a limit block, and the limit block is provided at the upper end of the guide rod.

[0020] As a further preference, it also includes a second spring, which is arranged on the outer edge of the guide rod, the upper end of the second spring is arranged in the valve stem and connected to the inner wall of the valve stem, and the lower end of the second spring is against the pressure cover.

[0021] The above technical solution has the following advantages or beneficial effects:

[0022] In the utility model, through the setting of the filtering mechanism, impurities in the fluid can be filtered, and the filter screen can move in the valve body of the diaphragm valve to avoid deformation or bursting of the external fluid pipeline due to blockage of the filter screen. Moreover, through the setting of the pushing mechanism, the diaphragm valve diaphragm can be pressed onto the raised valve seat, further improving the sealing between the diaphragm valve diaphragm and the valve seat, thereby improving the sealing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the internal structure of the diaphragm valve with filtering function in the utility model when it is opened;

[0024] Figure 2 This is a schematic diagram of the internal structure of the diaphragm valve with filtering function in the utility model when it is closed;

[0025] Figure 3 It is a structural schematic diagram of the filtering mechanism in the utility model;

[0026] Figure 4 It is a front view of the filtering mechanism in the utility model;

[0027] Figure 5 yes Figure 1 Enlarged view of point A in the middle.

[0028] In the figure: 1. diaphragm valve body; 2. valve cover; 3. valve stem; 4. valve seat; 5. diaphragm valve diaphragm; 6. filtering mechanism; 601. adjusting ring; 602. adjusting rod; 603. sliding ring; 604. filter screen; 605. sliding bearing; 606. adjusting hole; 607. first spring; 7. push seat; 8. pushing mechanism; 801. pressure cover; 802. pressure plate; 803. guide rod; 804. limit block; 805. second spring; 9. inlet end; 10. outlet end; 11. limit groove; 12. screw nut; 13. hand wheel. DETAILED DESCRIPTION

[0029] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] In the description of the present invention, it should be noted that if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, if the terms "first", "second", "third" appear, they are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0031] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] Figure 1 This is a schematic diagram of the internal structure of the diaphragm valve with filtering function in the utility model when it is opened; Figure 2 This is a schematic diagram of the internal structure of the diaphragm valve with filtering function in the utility model when it is closed; Figure 3 It is a structural schematic diagram of the filtering mechanism in the utility model; Figure 4 It is a front view of the filtering mechanism in the utility model; Figure 5 yes Figure 1 For the enlarged view of point A in the middle, please see Figures 1 to 5 As shown, a preferred embodiment is shown, which shows a diaphragm valve with filtering function, including a diaphragm valve body 1 and a valve cover 2 arranged at the upper end of the diaphragm valve body 1, a valve stem 3 is arranged in the valve cover 2, a raised valve seat 4 is arranged inside the diaphragm valve body 1, a diaphragm valve diaphragm 5 is arranged at the connection between the valve cover 2 and the diaphragm valve body 1, and also includes a filtering mechanism 6, a push seat 7 and a pushing mechanism 8, a push seat 7 is arranged at the lower end of the valve stem 3, a pushing mechanism 8 is arranged at the lower end of the push seat 7, and the filtering mechanism 6 is arranged in the inlet end 9 of the diaphragm valve body 1. In this embodiment, see Figure 1 As shown, the valve cover 2 and the diaphragm valve body 1 are connected by bolts, and a diaphragm valve diaphragm 5 is arranged between the two, and the sealing between the two is realized by the diaphragm valve diaphragm 5. Among them, the valve stem 3 can move up and down, driving the push seat 7 to move up and down, which is used to press the diaphragm valve diaphragm 5 downward, and the push seat 7 can move up and down with the valve stem 3, and the pushing mechanism 8 can move up and down with the valve stem 3, which is used to push the diaphragm valve diaphragm 5 downward, so that the diaphragm valve diaphragm 5 and the valve seat 4 are in close contact.

[0033] Wherein, the filtering mechanism 6 comprises:

[0034] An adjusting ring 601, a limiting groove 11 is provided on the inner wall of the inlet end 9 of the diaphragm valve body 1, and the adjusting ring 601 is arranged in the limiting groove 11;

[0035] An adjusting rod 602, one end of which is connected to the adjusting ring 601;

[0036] A sliding ring 603 is provided at the other end of the adjusting rod 602;

[0037] A filter screen 604, the filter screen 604 is disposed in the sliding ring 603;

[0038] Sliding bearing 605, a sliding bearing 605 is provided in the middle of the filter screen 604, and the sliding bearing 605 can be welded to the filter screen 604, and the sliding bearing 605 is sleeved on the outer edge of the adjustment rod 602. Among them, a filter frame is provided on the periphery of the filter screen 604, and the filter frame is arranged in an annular shape and is welded to the inner wall of the sliding ring 603, and can be connected by welding, wherein the sliding ring 603 can slide axially inside the inlet end 9, and the outer peripheral wall of the adjustment ring 601 is threadedly connected to the inner peripheral wall of the limiting groove 11, so that the position of the adjustment ring 601 can be adjusted as needed, and an adjustment hole 606 is opened in the middle of the other end of the adjustment rod 602, see Figure 3 and Figure 4 As shown, the adjustment hole 606 is a rectangular hole, which is convenient for matching with the external rectangular rod. The rectangular rod is inserted into the adjustment hole 606, and then the rectangular rod is rotated to drive the adjustment rod 602 to rotate, and the adjustment rod 602 drives the adjustment ring 601 to rotate, so that the position of the adjustment ring 601 can be adjusted. Among them, the sliding bearing 605 on the adjustment rod 602 can move along the axial direction of the adjustment rod 602, and can rotate circumferentially on the adjustment rod 602, which is convenient for the axial sliding of the sliding ring 603, and the rotation of the adjustment rod 602 will not affect the normal sliding of the sliding ring 603, and the sliding ring 603 contacts the inner wall of the inlet end 9.

[0039] The diaphragm valve body 1 in this embodiment has an inlet end 9 and an outlet end 10, the inlet end 9 is used for fluid entry, and the outlet end 10 is used for fluid discharge, wherein the fluid can refer to gas or liquid, and both the inlet end 9 and the outlet end 10 are used to connect to external fluid pipelines.

[0040] Further, as a preferred embodiment, the outer wall of the sliding ring 603 is slidably matched with the inner wall of the inlet end 9, and the outer diameter of the sliding ring 603 is smaller than the inner diameter of the adjusting ring 601. By setting the filter 604, impurities in the fluid can be filtered, such as large particles of impurities or impurities such as hair. Since impurities will accumulate on the filter 604, the holes of the filter 604 will be blocked or the fluid will pass slowly for a long time. At this time, the pressure in the fluid channel connected to the inlet end 9 will increase, causing the fluid channel to deform or burst. In the present application, by setting the sliding ring 603, when the filter 604 is blocked, the fluid will push the filter to drive the sliding ring 603 to move axially into the limiting groove 11. At this time, since the outer diameter of the sliding ring 603 is smaller than the inner diameter of the limiting groove 11, the fluid will pass from the periphery of the sliding ring 603, which has the effect of timely pressure relief and avoids deformation or bursting of the external fluid pipeline.

[0041] In this embodiment, under normal circumstances, the filter screen 604 can filter impurities in the fluid. When the filter screen 604 is blocked, the filter screen will be pushed into the limiting groove 11 to release pressure.

[0042] Further, as a preferred embodiment, it further includes a first spring 607, which is sleeved on the outer edge of the adjusting rod 602, one end of the first spring 607 is against the sliding bearing 605, and the other end of the first spring 607 is connected to the adjusting ring 601. The first spring 607 is used for automatic reset of the sliding ring 603, and when the sliding ring 603 moves into the limiting groove 11, the resistance of the first spring 607 can be overcome.

[0043] Further, as a preferred embodiment, it also includes a screw nut 12, the upper end of the valve cover 2 is movably provided with a screw nut 12, the upper end of the valve stem 3 passes through the screw nut 12 and is threadedly connected with the screw nut 12, and the upper end of the screw nut 12 is provided with a hand wheel 13. Figure 1 and Figure 2 As shown, through the threaded cooperation between the screw nut 12 and the valve stem 3, the rotation of the screw nut 12 can be converted into the vertical linear movement of the valve stem 3, wherein the upper and lower ends of the screw nut 12 are provided with limiting convex rings for clamping on the upper outer wall and the upper inner wall of the valve cover 2, so as to facilitate the limiting of the screw nut 12, but it does not affect the normal rotation of the screw nut 12. The hand wheel 13 is welded to the upper end of the screw nut 12, and the screw nut 12 can be driven to rotate by rotating the hand wheel 13, and the upper end of the valve stem 3 passes through the hand wheel 13.

[0044] Further, as a preferred embodiment, the pushing mechanism 8 includes a pressure cover 801, a pressure plate 802 and a guide rod 803. The valve stem 3 is hollow. The pressure cover 801 is located at the lower end of the push seat 7. The pressure cover 801 is provided with a pressure plate 802. The upper end of the pressure plate 802 is provided with a guide rod 803. The upper end of the guide rod 803 passes through the pressure cover 801 and is located in the valve stem 3. Figure 2 and Figure 5As shown, the gland 801 is arranged in an annular shape, and the lower end of the gland 801 is arranged in an open shape, and a stop block 804 is arranged at the upper end of the guide rod 803, and a second spring 805 is arranged at the outer edge of the guide rod 803, and the upper end of the second spring 805 is arranged in the valve stem 3 and connected to the inner wall of the valve stem 3, and the lower end of the second spring 805 is against the gland 801. Among them, the stop block 804 is arranged in an annular shape, and the outer wall of the stop ring contacts the inner wall of the valve cover 2, and is distributed on the guide rod 803 to move up and down stably, and cooperates with the second spring 805 arranged on the outer edge of the guide rod 803, so that the guide rod 803 moves stably. Among them, the second spring 805 is used to push the gland 801 downward, and the gland 801 will contact the pressure plate 802 after moving downward to a certain position, and push the pressure plate 802 to drive the guide rod 803 to move downward. The length of the guide rod 803 in this embodiment can be set as needed to prevent the guide rod 803 from escaping from the inside of the valve stem 3.

[0045] The lower end surface of the pressure cover 801 can be set as an arc surface, and the outer peripheral wall of the push seat 7 is set inclined. The inclination direction can be seen from Figure 5 As shown, the push seat 7 contacts the diaphragm valve membrane 5 through the inclined surface, avoiding the tip position from contacting the diaphragm valve membrane 5, thereby protecting the diaphragm valve membrane 5.

[0046] When in use, first connect the inlet end 9 and the outlet end 10 of the diaphragm valve body 1 to the corresponding external fluid pipelines respectively. When the diaphragm valve needs to be closed, the hand wheel 13 can be rotated. At this time, the hand wheel 13 drives the screw nut 12 to rotate, and the rotation of the screw nut 12 is converted into the axial movement of the valve stem 3. At this time, the valve stem 3 drives the push seat 7 and the pushing mechanism 8 to move downward. At this time, the pressure cover 801 will first contact the diaphragm valve diaphragm 5 and press the diaphragm valve diaphragm 5 downward, and then the pressure plate 802 presses the diaphragm valve diaphragm 5 downward. When the valve stem 3 continues to move downward, the inclined surface of the push seat 7 will squeeze the diaphragm valve diaphragm 5. The state of the diaphragm valve diaphragm 5 at this time can be seen in Figure 2 As shown, at this time, the lower end of the diaphragm valve membrane 5 contacts the upper surface and the outer side wall of the valve seat 4, thereby improving the sealing between the diaphragm valve membrane 5 and the valve seat 4 and achieving the closure of the diaphragm valve.

[0047] When the diaphragm valve needs to be opened, the hand wheel 13 is turned, and then the hand wheel 13 drives the screw nut 12 to rotate, and the rotation of the screw nut 12 is converted into the axial movement of the valve stem 3. At this time, the valve stem 3 moves upward to drive the push seat 7 and the push rod mechanism to move upward. Specifically, the push seat 7 is first separated from the diaphragm valve diaphragm 5, and then the gland 801 and the pressure plate 802 continue to move upward until they are completely separated from the diaphragm valve diaphragm 5. The gland 801 will move downward to the specified position under the action of the second spring 805, and when the gland 801 moves downward, it will push the pressure plate 802 to drive the guide rod 803 to move downward, so that when the diaphragm valve is closed next time, the gland 801 can first contact the diaphragm valve diaphragm 5. The diaphragm valve diaphragm 5 is elastic and can automatically restore to its original state after deformation.

[0048] When the fluid enters the diaphragm valve body 1 from the inlet end 9, the filter screen 604 will filter the impurities in the fluid. If too many impurities block the filter screen 604, the fluid can push the filter screen 604 to drive the sliding ring 603 to move, so that the sliding ring 603 and the filter screen 604 enter the limiting groove 11, achieving a timely pressure relief effect.

[0049] The above description is only a preferred embodiment of the present invention, and does not limit the implementation mode and protection scope of the present invention. For those skilled in the art, it should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. A diaphragm valve with filtering function, comprising a diaphragm valve body and a valve cover arranged at the upper end of the diaphragm valve body, a valve stem is arranged in the valve cover, a raised valve seat is arranged inside the diaphragm valve body, and a diaphragm valve diaphragm is arranged at the connection between the valve cover and the diaphragm valve body, characterized in that: It also includes a filtering mechanism, a push seat and a pushing mechanism, the push seat is provided at the lower end of the valve stem, the pushing mechanism is provided at the lower end of the push seat, the filtering mechanism is provided in the inlet end of the diaphragm valve body, wherein the filtering mechanism includes: An adjusting ring, wherein a limiting groove is provided on the inner wall of the inlet end of the diaphragm valve body, and the adjusting ring is arranged in the limiting groove; An adjusting rod, one end of which is connected to the adjusting ring; A sliding ring, the other end of the adjusting rod is provided with the sliding ring; A filter screen, wherein the filter screen is arranged in the sliding ring; A sliding bearing is provided in the middle of the filter screen and is sleeved on the outer edge of the adjusting rod.

2. The diaphragm valve with filtering function according to claim 1, characterized in that: The outer wall of the sliding ring is slidably matched with the inner wall of the inlet end, and the outer diameter of the sliding ring is smaller than the inner diameter of the adjusting ring.

3. The diaphragm valve with filtering function according to claim 1, characterized in that: An adjusting hole is provided in the middle of the other end of the adjusting rod.

4. The diaphragm valve with filtering function according to claim 1, characterized in that: The outer peripheral wall of the adjusting ring is threadedly connected to the inner peripheral wall of the limiting groove.

5. The diaphragm valve with filtering function according to claim 1, characterized in that: It also includes a first spring, which is sleeved on the outer edge of the adjusting rod, one end of the first spring is against the sliding bearing, and the other end of the first spring is connected to the adjusting ring.

6. The diaphragm valve with filtering function according to claim 1, characterized in that: It also includes a screw nut, which is movably provided on the upper end of the valve cover, the upper end of the valve stem passes through the screw nut and is threadedly connected with the screw nut, and a hand wheel is provided on the upper end of the screw nut.

7. The diaphragm valve with filtering function according to claim 1, characterized in that: The pushing mechanism includes a pressure cover, a pressure plate and a guide rod. The valve stem is hollow. The pressure cover is located at the lower end of the push seat. The pressure plate is arranged inside the pressure cover. The guide rod is arranged at the upper end of the pressure plate. The upper end of the guide rod passes through the pressure cover and is located inside the valve stem.

8. The diaphragm valve with filtering function according to claim 7, characterized in that: It also includes a limit block, and the upper end of the guide rod is provided with the limit block.

9. The diaphragm valve with filtering function according to claim 8, characterized in that: It also includes a second spring, which is arranged on the outer edge of the guide rod, the upper end of the second spring is arranged in the valve stem and is against the inner wall of the valve stem, and the lower end of the second spring is against the pressure cover.

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