Diaphragm valve used in vacuum-high pressure environment

Abstract

The utility model relates to the technical field of control valve bodies, in particular to a diaphragm valve used in a vacuum-high pressure environment. The technical problems that a common diaphragm valve is sealed only through a single diaphragm structure, when the diaphragm valve is used in a vacuum or high-pressure environment, the overall sealing performance is difficult to guarantee, meanwhile, a mistaken touch prevention structure is lacked, a valve body is prone to being accidentally opened or closed due to mistaken touch, and the use safety needs to be improved are solved. According to the technical scheme, the diaphragm valve used in the vacuum-high pressure environment comprises a mounting pipe. According to the utility model, through the arrangement of the two groups of sealing seats and elastic diaphragms which are matched with each other, multiple sealing can be realized, the overall sealing performance can be ensured in a vacuum or high-pressure environment, meanwhile, through the arrangement of the mistaken touch prevention extrusion assembly, the mistaken touch prevention effect is achieved, the valve body is prevented from being opened or closed accidentally, and the use safety can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of control valve bodies, in particular to a diaphragm valve used in a vacuum-high pressure environment. Background Art

[0002] The diaphragm valve is a stop valve that uses a diaphragm as an opening and closing member to close the flow channel, cut off the fluid, and separate the valve body cavity from the valve cover cavity. The diaphragm is usually made of elastic, corrosion-resistant, and non-permeable materials such as rubber and plastic. The valve body is mostly made of plastic, fiberglass, ceramic or metal-lined rubber materials. It has a simple structure, good sealing and corrosion resistance, and low fluid resistance.

[0003] Common diaphragm valves are sealed only by a single diaphragm structure. When used in a vacuum or high-pressure environment, the overall sealing is difficult to ensure. At the same time, there is a lack of an anti-mistouch structure, and the valve body can be accidentally opened or closed due to mistouch. The safety of use needs to be improved.

[0004] Therefore, the above-mentioned diaphragm valve is sealed only by a single diaphragm structure, and the overall sealing is difficult to ensure. At the same time, there is a lack of an anti-accidental touch structure, and the safety of use needs to be improved. This problem urgently needs to be solved to improve the usage scenario. Utility Model Content

[0005] In order to overcome the common diaphragm valve, sealing is only performed by a single diaphragm structure, the overall sealing is difficult to ensure, and there is a lack of an anti-accidental touch structure.

[0006] The technical solution of the utility model is: a diaphragm valve for use in a vacuum-high pressure environment, comprising a mounting tube, threaded connecting tubes are arranged at the left and right ends of the mounting tube, a fixing frame is installed at the middle upper end of the mounting tube, a sealing seat is fixedly connected to the inner part of the lower end of the mounting tube near the left and right sides of the fixing frame, a mounting plate is installed near the lower end of the fixing frame, elastic diaphragms are arranged near the left and right ends of the mounting plate, screw holes are opened at the tops of the left and right ends of the fixing frame, and an anti-mistaken touch extrusion component is installed at the upper end of the fixing frame.

[0007] Preferably, multiple seals can be achieved by setting up two sets of sealing seats and elastic diaphragms that cooperate with each other, and the overall sealing can be guaranteed in a vacuum or high-pressure environment. At the same time, the anti-accidental-touch extrusion component is set up to have an anti-accidental-touch effect, thereby preventing the valve body from being accidentally opened or closed, thereby improving the safety of use. This solves the problem that common diaphragm valves are sealed only by a single diaphragm structure, and the overall sealing is difficult to guarantee when used in a vacuum or high-pressure environment. At the same time, the lack of an anti-accidental-touch structure makes the valve body easily opened or closed accidentally due to an accidental touch, and the safety of use needs to be improved.

[0008] Preferably, the anti-accidental-touch extrusion assembly includes a cover plate, a connecting block, and fixing screws; the cover plate is connected to the upper end of the fixing frame, and connecting blocks are installed on the left and right ends of the cover plate. The fixing screws pass through the connecting block and are connected to the screw holes for easy installation and connection.

[0009] Preferably, the anti-accidental-touch extrusion assembly includes a threaded sleeve and a threaded rod; a threaded sleeve is installed in the middle position of the cover plate, and a threaded rod is transmission-connected inside the threaded sleeve. When the threaded rod rotates, it cooperates with the threaded sleeve to achieve lifting and lowering.

[0010] Preferably, the anti-accidental-touch extrusion assembly includes a pressure plate and an extrusion block; the lower end of the threaded rod is connected to the pressure plate through a bearing, and the extrusion block is installed at the bottom of the pressure plate corresponding to the elastic diaphragm. When the threaded rod drives the pressure plate to descend, the extrusion block squeezes the elastic diaphragm downward to make it tightly attached to the sealing seat, and the corresponding two sets of elastic diaphragms and the sealing seat can achieve multiple sealing effects.

[0011] Preferably, the anti-accidental-touch extrusion assembly includes a toothed disc, a connecting rod, and an anti-slip end; a toothed disc is provided at the top of the threaded rod, the upper end of the toothed disc is connected to the connecting rod, and the anti-slip end is installed on the top of the connecting rod.

[0012] Preferably, the anti-accidental-touch extrusion assembly includes a handwheel, an inner gear ring, and a spring; a handwheel is movably connected to the outer side of the connecting rod between the toothed disc and the anti-slip end, an inner gear ring is installed at the bottom of the handwheel edge, and a spring is arranged between the lower end of the handwheel and the top of the toothed disc. When the handwheel is accidentally touched and rotated, the spring supports the handwheel so that the inner gear ring at the bottom does not contact the toothed disc, and the threaded rod cannot be rotated at this time. When the valve body needs to be opened or closed, the handwheel is first pressed down to compress the spring. After the inner gear ring engages with the toothed disc, the handwheel is rotated to drive the toothed disc and the threaded rod to rotate, which has an anti-accidental-touch effect and improves the safety of use.

[0013] Beneficial effects of the utility model:

[0014] 1. Multiple seals can be achieved by setting two sets of mutually cooperating sealing seats and elastic diaphragms, and the overall sealing can be guaranteed in a vacuum or high-pressure environment. At the same time, the anti-mistaken-touch extrusion component has an anti-mistaken-touch effect to prevent the valve body from being accidentally opened or closed, which can improve the safety of use, so as to solve the problem that the common diaphragm valve is sealed only by a single diaphragm structure. When used in a vacuum or high-pressure environment, the overall sealing is difficult to ensure. At the same time, the lack of an anti-mistaken-touch structure makes the valve body easily accidentally opened or closed due to mis-touch, and the safety of use needs to be improved;

[0015] 2. When the handwheel is accidentally touched and turned, the spring supports the handwheel so that the inner gear ring at the bottom does not contact the toothed disc. The threaded rod cannot be turned at this time. When the valve body needs to be opened or closed, first press the handwheel down to compress the spring. After the inner gear ring engages with the toothed disc, turn the handwheel to drive the toothed disc and the threaded rod to rotate, which has an anti-accidental touch effect and improves the safety of use. When the threaded rod rotates, it can be lifted and lowered in cooperation with the threaded sleeve. When the threaded rod drives the pressure plate to descend, the extrusion block squeezes the elastic diaphragm downward to make it close to the sealing seat. The corresponding two sets of elastic diaphragms and the sealing seat can achieve multiple sealing effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 What is shown is a three-dimensional structural schematic diagram of a diaphragm valve used in a vacuum-high pressure environment of the utility model;

[0017] Figure 2 Shown is a schematic diagram of the internal structure of a diaphragm valve used in a vacuum-high pressure environment of the utility model;

[0018] Figure 3 Shown is a schematic diagram of the structure of a diaphragm valve anti-mistouch extrusion assembly for use in a vacuum-high pressure environment of the utility model;

[0019] Figure 4 Shown is a schematic diagram of the spring installation structure of a diaphragm valve used in a vacuum-high pressure environment of the utility model.

[0020] In the figure: 1. mounting tube; 2. threaded connecting tube; 3. fixing frame; 4. sealing seat; 5. mounting plate; 6. elastic diaphragm; 7. screw hole; 8. anti-accidental touch extrusion assembly; 801. cover plate; 802. connecting block; 803. fixing screw; 804. threaded sleeve; 805. threaded rod; 806. pressure plate; 807. extrusion block; 808. toothed disc; 809. connecting rod; 810. anti-slip terminal; 811. handwheel; 812. inner gear ring; 813. spring. DETAILED DESCRIPTION

[0021] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0022] See also Figure 1-2 The utility model provides an embodiment: a diaphragm valve for use in a vacuum-high pressure environment, comprising a mounting tube 1, threaded connecting tubes 2 are arranged at the left and right ends of the mounting tube 1, a fixing frame 3 is installed at the middle upper end of the mounting tube 1, a sealing seat 4 is fixedly connected to the lower end of the mounting tube 1 near the left and right sides of the fixing frame 3, a mounting plate 5 is installed near the lower end of the fixing frame 3, elastic diaphragms 6 are arranged near the left and right ends of the mounting plate 5, screw holes 7 are opened at the tops of the left and right ends of the fixing frame 3, and an anti-mistaken touch extrusion component 8 is installed at the upper end of the fixing frame 3.

[0023] See also Figure 3 In this embodiment, the anti-accidental touch extrusion component 8 includes a cover plate 801, a connecting block 802, and a fixing screw 803; the upper end of the fixing frame 3 is connected to the cover plate 801, and the left and right ends of the cover plate 801 are installed with connecting blocks 802, and the fixing screws 803 pass through the connecting blocks 802 and are connected to the screw holes 7 for easy installation and connection. The anti-accidental touch extrusion component 8 includes a threaded sleeve 804 and a threaded rod 805; a threaded sleeve 804 is installed in the middle position of the cover plate 801, and the threaded sleeve 804 is internally connected to the threaded rod 80 5. When the threaded rod 805 rotates, it cooperates with the threaded sleeve 804 to achieve lifting and lowering. The anti-mistaken touch extrusion component 8 includes a pressure plate 806 and an extrusion block 807. The lower end of the threaded rod 805 is connected to the pressure plate 806 through a bearing, and the extrusion block 807 is installed at the corresponding position of the bottom of the pressure plate 806 and the elastic diaphragm 6. When the threaded rod 805 drives the pressure plate 806 to descend, the extrusion block 807 squeezes the elastic diaphragm 6 downward to make it close to the sealing seat 4, and the corresponding two groups of elastic diaphragms 6 and the sealing seat 4 can achieve multiple sealing effects.

[0024] See also Figure 4 In this embodiment, the anti-accidental touch extrusion component 8 includes a toothed disc 808, a connecting rod 809, and an anti-slip end 810; a toothed disc 808 is arranged on the top of the threaded rod 805, and a connecting rod 809 is connected to the upper end of the toothed disc 808, and an anti-slip end 810 is installed on the top of the connecting rod 809. The anti-accidental touch extrusion component 8 includes a handwheel 811, an inner gear ring 812, and a spring 813; the outer side of the connecting rod 809 is movably connected with a handwheel 811 at a position between the toothed disc 808 and the anti-slip end 810, and an inner gear ring 812 is installed at the bottom of the edge of the handwheel 811. A spring 813 is provided between the lower end of 811 and the top of the toothed disc 808. When the handwheel 811 is accidentally touched and rotated, the spring 813 supports the handwheel 811 so that the inner toothed ring 812 at the bottom does not contact the toothed disc 808. At this time, the threaded rod 805 cannot be rotated. When the valve body needs to be opened or closed, the handwheel 811 is first pressed down to compress the spring 813. After the inner toothed ring 812 is meshed with the toothed disc 808, the handwheel 811 is rotated to drive the toothed disc 808 and the threaded rod 805 to rotate, which has an anti-accidental touch effect and improves the safety of use.

[0025] During operation, a sealing seat 4 is fixedly connected to the lower end of the mounting tube 1 near the left and right sides of the fixing frame 3, a mounting plate 5 is installed near the lower end of the fixing frame 3, and elastic diaphragms 6 are provided near the left and right ends of the mounting plate 5. When the hand wheel 811 is accidentally touched and turned, the spring 813 supports the hand wheel 811 so that the inner tooth ring 812 at the bottom does not contact the toothed disc 808, and the threaded rod 805 cannot be turned at this time. When the valve body needs to be opened or closed, the hand wheel 811 is first pressed down. 11. After the spring 813 is compressed and the inner gear ring 812 is meshed with the toothed disc 808, the hand wheel 811 is rotated at this time to drive the toothed disc 808 and the threaded rod 805 to rotate, which has an anti-mistouch effect and improves the safety of use. When the threaded rod 805 rotates, it can be lifted and lowered in cooperation with the threaded sleeve 804. When the threaded rod 805 drives the pressure plate 806 to descend, the extrusion block 807 squeezes the elastic diaphragm 6 downward to make it close to the sealing seat 4, and the corresponding two groups of elastic diaphragms 6 and the sealing seat 4 can achieve multiple sealing effects.

[0026] Through the above steps, multiple seals can be achieved by setting two sets of mutually cooperating sealing seats 4 and elastic diaphragms 6, and the overall sealing can be guaranteed in a vacuum or high-pressure environment. At the same time, the anti-accidental touch extrusion component 8 is set to have an anti-accidental touch effect, thereby preventing the valve body from being accidentally opened or closed, thereby improving the safety of use, so as to solve the problem that common diaphragm valves are sealed only by a single diaphragm structure, and the overall sealing is difficult to guarantee when used in a vacuum or high-pressure environment. At the same time, the lack of an anti-accidental touch structure makes the valve body easily opened or closed accidentally due to an accidental touch, and the safety of use needs to be improved.

[0027] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of those skilled in the art without departing from the purpose of the present invention.

Claims

1. A diaphragm valve for use in a vacuum-high pressure environment, comprising a mounting tube (1), characterized in that: Threaded connection pipes (2) are arranged at the left and right ends of the installation pipe (1), a fixing frame (3) is arranged at the middle upper end of the installation pipe (1), a sealing seat (4) is fixedly connected to the inside of the lower end of the installation pipe (1) near the left and right sides of the fixing frame (3), a mounting plate (5) is arranged near the lower end of the fixing frame (3), elastic membranes (6) are arranged near the left and right ends of the mounting plate (5), screw holes (7) are arranged at the top of the left and right ends of the fixing frame (3), and an anti-mistaken touch extrusion component (8) is arranged at the upper end of the fixing frame (3).

2. A diaphragm valve for use in a vacuum-high pressure environment according to claim 1, characterized in that: The anti-mistaken-touch squeezing assembly (8) comprises a cover plate (801), a connecting block (802), and fixing screws (803); the upper end of the fixing frame (3) is connected to the cover plate (801), the left and right ends of the cover plate (801) are installed with connecting blocks (802), and the fixing screws (803) pass through the connecting blocks (802) and are connected to the screw holes (7).

3. A diaphragm valve for use in a vacuum-high pressure environment according to claim 2, characterized in that: The anti-mis-touch squeezing assembly (8) comprises a threaded sleeve (804) and a threaded rod (805); the threaded sleeve (804) is installed in the middle of the cover plate (801), and the threaded rod (805) is transmission-connected inside the threaded sleeve (804).

4. A diaphragm valve for use in a vacuum-high pressure environment according to claim 3, characterized in that: The anti-mis-touch squeezing assembly (8) comprises a pressing plate (806) and a squeezing block (807); the lower end of the threaded rod (805) is connected to the pressing plate (806) via a bearing, and the squeezing block (807) is installed at the bottom of the pressing plate (806) at a position corresponding to the elastic diaphragm (6).

5. A diaphragm valve for use in a vacuum-high pressure environment according to claim 4, characterized in that: The anti-mis-touch extrusion assembly (8) comprises a toothed disc (808), a connecting rod (809), and an anti-slip end (810); a toothed disc (808) is arranged on the top of the threaded rod (805), a connecting rod (809) is connected to the upper end of the toothed disc (808), and an anti-slip end (810) is installed on the top of the connecting rod (809).

6. A diaphragm valve for use in a vacuum-high pressure environment according to claim 5, characterized in that: The mis-touch extrusion assembly (8) comprises a hand wheel (811), an inner tooth ring (812), and a spring (813); the hand wheel (811) is movably connected to the outer side of the connecting rod (809) between the toothed disc (808) and the anti-slip end (810); the inner tooth ring (812) is installed at the bottom of the edge of the hand wheel (811); and the spring (813) is arranged between the lower end of the hand wheel (811) and the top of the toothed disc (808).

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