Pressure detectable overflow valve

Abstract

The utility model discloses a kind of pressure-detectable overflow valves, specifically related to overflow valve technical field, the utility model is equipped with pressure detection valve on inlet, the side top of pressure detection valve is provided with connecting cable, the side of connecting cable is provided with take-up mechanism, rubber gasket and tightly adhere to the cable of winding;Rubber gasket can not only avoid cable to be pressed by pressing plate and internal conductor wire is injured, but also can increase the friction of cable by elastic deformation, effectively prevent equipment operation from vibration and cause cable slackening, displacement.

Description

Technical Field

[0001] This utility model relates to the field of relief valve technology, and in particular to a pressure-detectable relief valve. Background Technology

[0002] In the field of relief valve technology, in order to achieve real-time monitoring and control of medium pressure, some relief valves integrate pressure detection valve components. The pressure detection valve needs to establish signal and power connections with external control equipment through connecting cables in order to transmit pressure detection data and receive control commands.

[0003] In the existing design of integrated pressure detection valves for overflow valves, there are obvious deficiencies in the cable management structure: most overflow valves do not have a dedicated cable management mechanism, and the connecting cables are usually of fixed length or simply bundled together. When there is a difference in the installation distance between the overflow valve and the external control equipment, the excessively long cables are prone to hanging loosely or being placed randomly, which not only occupies the space around the equipment, but may also get caught on the overflow valve body, pipelines or other surrounding equipment. Utility Model Content

[0004] This invention proposes a pressure-detecting relief valve to solve the problem that excessively long connecting wires easily get tangled on electronic pressure valves, hindering their normal operation.

[0005] To achieve the above objectives, this utility model adopts the following technical solution: a pressure-detectable relief valve, comprising a relief valve body, the relief valve body including a valve body, an upper flow hole and a lower flow hole being provided on the outer peripheral side of the valve body, wherein the upper flow hole is opened radially along the valve body and the lower flow hole is opened axially along the valve body, the two perpendicularly intersecting and communicating with each other inside the valve body, an adjustment through hole is also provided on the outer peripheral side of the valve body, the adjustment through hole extending radially along the valve body and communicating with the upper flow hole, the inner wall of the port of the adjustment through hole away from the upper flow hole is provided with an internal thread, the port being threadedly connected to an adjustment plug, a return spring being rotatably installed at one end of the adjustment plug near the upper flow hole, the other end of the return spring extending axially along the adjustment through hole and fixedly connected to a sealing plug, the sealing plug... The adapter is fitted into the port of the upper flow hole near the regulating through hole to seal the junction of the upper and lower flow holes. Both the port of the upper flow hole furthest from the regulating through hole and the port of the lower flow hole furthest from the valve body are fixedly equipped with connecting pipes. The connecting pipe corresponding to the upper flow hole is the outlet, and the connecting pipe corresponding to the lower flow hole is the inlet. A pressure detection valve is fixedly installed on the connecting pipe of the inlet. A connecting cable is also installed on the outer periphery of the pressure detection valve, and one end of the connecting cable is electrically connected to the top of one side of the pressure detection valve. When the medium pressure in the connecting pipe of the inlet exceeds the preload of the return spring, the sealing plug is pushed axially along the upper flow hole by the medium pressure, simultaneously compressing the return spring and disengaging from the upper flow hole port, thus no longer sealing the junction of the lower and upper flow holes.

[0006] Preferably, the connecting cable is provided with a take-up mechanism on the side near the valve body. The take-up mechanism includes a threaded winding rod, an upper fixing block and a lower fixing block. The upper fixing block is vertically fixed to the top of the valve body on the side near the pressure detection valve. The lower fixing block is vertically fixed to the bottom of the valve body on the same side as the upper fixing block. The threaded winding rod is arranged in a vertical direction, and its two ends are rotatably engaged with the bottom of the upper fixing block and the top of the lower fixing block, respectively.

[0007] Preferably, the take-up mechanism further includes an auxiliary baffle and a wire pressure plate. The auxiliary baffle is fixed vertically between the bottom of the upper fixed block and the top of the lower fixed block, and the surface of the auxiliary baffle is parallel to the outer peripheral side of the valve body. The wire pressure plate is horizontally arranged and has an internal thread hole in its center that is adapted to the threaded winding rod. The internal thread engages with the outer surface thread of the threaded winding rod, and the side of the wire pressure plate away from the valve body slides against the side of the auxiliary baffle close to the threaded winding rod.

[0008] Preferably, the auxiliary baffle has a sliding groove vertically formed on the side near the threaded winding rod, and a sliding block is vertically fixed to the side of the wire pressure plate near the auxiliary baffle. The end of the sliding block away from the wire pressure plate is embedded in the sliding groove, and the outer peripheral surface of the sliding block slides in cooperation with the inner wall of the sliding groove.

[0009] Preferably, the top end of the threaded winding rod extends upward to form an upper fixing block, and an operating knob is fixedly connected to the outer peripheral surface of the extended end. The outer peripheral surface of the operating knob is uniformly provided with protrusions to increase the friction between the hand and the knob.

[0010] Preferably, a rubber gasket is attached and fixed to the side of the wire pressure plate near the upper fixing block. The center of the rubber gasket has a through hole that matches the threaded winding rod. The inner wall of the through hole slides with the outer surface of the threaded winding rod and moves synchronously along the axial direction of the threaded winding rod with the wire pressure plate.

[0011] Preferably, both of the outer peripheral surfaces of the connecting pipe ports are provided with a reinforcing mechanism, which includes a rubber sleeve, a rubber support pad, and an auxiliary ring. The rubber sleeve is interference-fitted onto the outer peripheral surface of the connecting pipe port, and one end of the rubber sleeve abuts against the outer peripheral side of the valve body. The rubber support pad is evenly distributed along the outer peripheral surface of the rubber sleeve away from the valve body, and its vertical cross-section is triangular. One right-angle side of the triangle is fixed to the outer peripheral surface of the rubber sleeve, and the other right-angle side abuts against the side of the auxiliary ring near the rubber sleeve. The inner wall of the auxiliary ring is fixedly connected to the outer peripheral surface of the connecting pipe near the connecting pipe port. The connecting pipe port is radially supported by the rubber sleeve and the rubber support pad to prevent excessive bending of the connecting pipe port.

[0012] Preferably, the reinforcing mechanism further includes a mounting plate and a fixing bolt. The mounting plate is vertically fixed to the side of the rubber support pad away from the rubber sleeve, and a through hole is provided on the mounting plate. The auxiliary ring has a threaded hole adapted to the fixing bolt on the side near the mounting plate. One end of the fixing bolt passes through the through hole of the mounting plate and the threaded hole of the auxiliary ring in sequence, and is screwed into the thread of the auxiliary ring to fix the rubber support pad and the auxiliary ring.

[0013] In summary, the beneficial effects of this utility model are as follows:

[0014] In the take-up mechanism, the cable pressure plate, through its threaded engagement with the threaded winding rod and the limiting action of the sliding block and sliding groove, can move smoothly vertically until the rubber gasket is tightly fitted with the wound cable. The rubber gasket not only prevents the cable from being damaged by the pressure plate's internal conductors, but also increases the friction with the cable through elastic deformation, effectively preventing the cable from loosening or shifting due to vibration during equipment operation. Simultaneously, the cable fixing clips on the outer periphery of the valve body further limit the cable extension, ensuring the cable remains neat throughout and preventing poor contact at the pressure detection valve's aviation plug interface due to cable movement, thus guaranteeing the stability of pressure signal transmission. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model.

[0016] Figure 2 This is a schematic diagram of the internal structure of this utility model.

[0017] Figure 3 This is a schematic diagram of the first mechanism of this utility model.

[0018] Figure 4 This is a schematic diagram of the reinforcing mechanism of this utility model.

[0019] Explanation of reference numerals in the attached figures:

[0020] 1. Pressure detection valve; 2. Connecting cable; 3. Upper fixing block; 4. Lower fixing block; 5. Threaded winding rod; 6. Auxiliary baffle; 7. Cable pressure plate; 8. Sliding groove; 9. Sliding block; 10. Operating knob; 11. Rubber gasket; 12. Rubber sleeve; 13. Rubber support pad; 14. Mounting plate; 15. Fixing bolt; 16. Connecting pipe port; 17. Valve body; 18. Adjusting through hole; 19. Upper flow hole; 20. Lower flow hole; 21. Sealing plug; 22. Return spring; 23. Adjusting plug. Detailed Implementation

[0021] Reference Figure 1 - Figure 4 As shown, this embodiment discloses a pressure-detectable relief valve, which is composed of four main modules: a relief valve body assembly, a pressure detection valve 1, a take-up mechanism, and a reinforcing mechanism. The valve body 17 has a columnar structure, and three types of functional channels are opened on its outer peripheral side in different directions: one is opened radially (horizontally) along the valve body 17, one end extends to the outer wall of the valve body 17, and the other end communicates with the internal channel of the valve body 17 near the inner wall of the port of the regulating through hole 18; and 2-3 evenly distributed guide grooves are opened axially for the movement of the sealing plug 21. Guide; it is opened along the axial (vertical) direction of the valve body 17, with one end extending from the bottom of the valve body 17 to the interior, and the other end perpendicularly intersecting with the upper flow hole 19 inside the valve body 17 to form an L-shaped flow channel; it is opened along the radial direction of the valve body 17, and is distributed at intervals in the same direction as the upper flow hole 19, with one end extending to the outer wall of the valve body 17, and the other end communicating with the upper flow hole 19, and the diameter of the adjusting through hole 18 is slightly larger than that of the upper flow hole 19, and the inner wall of its outer wall port away from the upper flow hole 19 is provided with internal threads for assembling the adjusting plug 23.

[0022] Reference Figure 1 - Figure 4 As shown, the adjusting plug 23 is screwed onto the internally threaded port of the adjusting through hole 18 to achieve sealing at the end of the through hole; an annular groove is provided at one end of the adjusting plug 23 near the upper through hole 19, the groove depth is adapted to the wire diameter of the return spring 22, and the groove width is slightly larger than the wire diameter of the spring; one end of the return spring 22 is embedded in the groove and fixed by spot welding to prevent the spring from falling off; the other end of the return spring 22 extends axially along the adjusting through hole 18 and is fixedly connected to the end face of the sealing plug 21.

[0023] Reference Figure 1 - Figure 4 As shown, the sealing plug 21 is adapted to the port of the upper flow hole 19, and an annular sealing groove is formed on its outer circumference. An O-ring (made of the same material as the sealing plug 21) is embedded in the groove. In the initial state, the sealing plug 21 is fitted into the port of the upper flow hole 19 near the adjustment through hole 18. The O-ring tightly fits the inner wall of the upper flow hole 19, sealing the junction of the upper flow hole 19 and the lower flow hole 20. At the same time, a guide protrusion is provided on the outer circumference of the sealing plug 21 at the position corresponding to the guide groove of the upper flow hole 19. The protrusion is embedded in the guide groove and slides with the groove wall to ensure that the sealing plug 21 only moves along the axial direction of the upper flow hole 19, avoiding displacement that could lead to sealing failure. The upper flow hole 19, located away from the regulating through hole 18, and the lower flow hole 20, located away from the interior of the valve body 17 (bottom port of the valve body 17), are both fixedly installed with connecting pipe ports 16 by interference fit and welding. The connecting pipe port 16 corresponding to the upper flow hole 19 is the liquid outlet, used for media discharge in case of overflow; the connecting pipe port 16 corresponding to the lower flow hole 20 is the liquid inlet, used for media input, and its outer circumferential surface is machined with external threads. The input end of the pressure detection valve 1 has an internal threaded hole, which is assembled with the liquid inlet connecting pipe port 16 by thread engagement, and the threaded connection is sealed by wrapping Teflon tape. The signal output end of the pressure detection valve 1 is a standard aviation plug interface, and one end of the connecting cable 2 is equipped with an adapter aviation plug, which is used to achieve electrical connection by plugging and unplugging. Along the extension path of the connecting cable 2, 2-3 cable fixing clips are set at intervals on the outer circumferential side of the valve body 17; the connecting cable 2 is embedded in the clips and fixed by the elastic clamping force of the clips to prevent the cable from loosening due to vibration and shaking during equipment operation.

[0024] Reference Figure 1 - Figure 4 As shown, the cable winding mechanism is located on the side of the valve body 17 near the pressure detection valve 1 to organize the connecting cable 2 and prevent it from becoming loose and tangled. The upper fixing block 3 and the lower fixing block 4 are spatially distributed in a vertically corresponding manner. The upper fixing block 3 is vertically fixed to the top outer wall of the valve body 17 by bolts, and the lower fixing block 4 is vertically fixed to the bottom outer wall of the valve body 17 corresponding to the lower part of the upper fixing block 3 by bolts, forming a vertical support frame.

[0025] Reference Figure 1 - Figure 4As shown, the threaded winding rod 5 is vertically positioned between the upper and lower fixing blocks. Its top end passes through the center hole of the upper fixing block 3 with a clearance fit, and its bottom end passes through the center hole of the lower fixing block 4 with a clearance fit. It can rotate clockwise / counterclockwise around its own axis, and the thread pitch is adapted to the outer diameter of the connecting cable 2. The top end of the threaded winding rod 5 extends upward beyond the upper fixing block 3, and the operating knob 10 is welded to the outer circumference of the extended end. The outer circumference of the operating knob 10 has 8-12 hemispherical protrusions evenly distributed. The auxiliary baffle 6 is welded vertically between the bottom of the upper fixed block 3 and the top of the lower fixed block 4. The plate surface is parallel to the outer wall of the valve body 17, and a sliding groove 8 is provided vertically on the side near the threaded winding rod 5. The wire pressure plate 7 is horizontal plate-shaped with an internal threaded hole in the center that matches the threaded winding rod 5. It is fitted onto the outer circumference of the threaded winding rod 5 through threaded engagement. A sliding block 9 is welded and fixed on the side of the wire pressure plate 7 near the auxiliary baffle 6. The sliding block 9 is embedded in the sliding groove 8. The two are fitted with a clearance to restrict the wire pressure plate 7 from rotating with the threaded winding rod 5 and can only move in the vertical direction.

[0026] Reference Figure 1 - Figure 4 As shown, a rubber gasket 11 is bonded to the side of the cable clamping plate 7 near the upper fixing block 3. The rubber gasket 11 has a through hole in its center that matches the threaded winding rod 5. The inner wall of the through hole slides in contact with the outer circumferential surface of the threaded winding rod 5. The rubber gasket 11 prevents the cable clamping plate 7 from damaging the internal wires when clamping the cable, and at the same time enhances the friction between the cable and the clamping plate, improving clamping stability. The reinforcing mechanism is correspondingly set on the outer circumferential surface of the two connecting pipe ports 16 to enhance the connection strength between the connecting pipe ports 16 and the external connecting pipe. The rubber sleeve 12 is interference-fitted onto the outer circumferential surface of the connecting pipe port 16, tightly wrapping the section of the connecting pipe port 16 from the outer wall of the valve body 17 to the interface of the external connecting pipe. It absorbs external force through its own elastic deformation, achieving initial protection and support for the connecting pipe port 16. The vertical cross-section of the rubber support pad 13 is triangular (utilizing the stability of triangles), and 3-4 pads are evenly spaced along the circumference of the rubber sleeve 12. One right-angled side of each rubber support pad 13 is fixed to the outer circumference of the rubber sleeve 12 by adhesive bonding, and the other right-angled side abuts against one side of the auxiliary ring. The auxiliary ring is a metal ring structure, and its inner wall is fixed to the outer circumference of the end of the external connecting pipe near the connecting pipe port 16 by argon arc welding or brazing. After welding, the weld is ground and pressure tested to ensure welding strength and sealing.

[0027] Reference Figure 1 - Figure 4As shown, each rubber support pad 13 has a mounting plate 14 (arc-shaped structure, adapted to the outer circumference of the auxiliary ring) welded to the side away from the rubber sleeve 12. The mounting plate 14 has a through hole. The outer circumference of the auxiliary ring has an internal threaded hole corresponding to the mounting plate 14. One end of the fixing bolt 15 passes through the through hole of the mounting plate 14 and the threaded hole of the auxiliary ring in sequence, and is fixed by screwing the threads. A spring washer is set between the bolt and the mounting plate 14, or a removable thread-locking adhesive is applied to the bolt threads to prevent the bolt from loosening due to equipment vibration.

[0028] Working principle

[0029] The return spring 22 is in a naturally pre-tightened state, pushing the sealing plug 21 to be fitted into the upper flow hole 19 port, sealing the junction of the upper flow hole 19 and the lower flow hole 20 with an O-ring seal; the pressure detection valve 1 is energized and in standby mode, providing real-time feedback of the medium pressure in the inlet connection pipe 16 to the external control equipment via the connecting cable 2. When the external medium enters the lower flow hole 20 from the inlet connection pipe 16, the medium pressure is less than the pre-tightening force of the return spring 22, the sealing plug 21 remains in a blocking state, the medium cannot enter the upper flow hole 19, and the overflow valve is in a closed state; the pressure detection valve 1 continuously provides feedback of the current pressure signal, facilitating real-time monitoring by the operator. If the medium pressure gradually increases and exceeds the preload of the return spring 22, the thrust of the medium on the sealing plug 21 overcomes the spring force, pushing the sealing plug 21 to move axially along the upper flow hole 19 towards the adjusting through hole 18 (the guide ridge slides along the guide groove to ensure smooth movement), simultaneously compressing the return spring 22; as the sealing plug 21 moves, the junction of the upper flow hole 19 and the lower flow hole 20 gradually opens, and the medium enters the upper flow hole 19 from the lower flow hole 20, and is finally discharged through the outlet pipe 16, achieving overflow pressure reduction; the pressure detection valve 1 provides real-time feedback on the pressure changes during the overflow process until the medium pressure drops below the threshold. When the medium pressure drops below the preload of the return spring 22, the return spring 22 releases its elastic potential energy, pushing the sealing plug 21 to move in the opposite direction along the guide groove, re-embedding it in the upper flow hole 19 port, sealing the junction, and the overflow valve returns to its initial closed state. If there is slight leakage after the sealing plug 21 is reset, the adjusting plug 23 can be slightly rotated clockwise to compress the return spring 22 to fine-tune the preload until the leakage stops. Rotating the adjusting plug 23 clockwise moves the plug into the valve body 17, increasing the spring preload and raising the overflow threshold; rotating the adjusting plug 23 counterclockwise moves the plug outward, relaxing the spring and lowering the overflow threshold. After adjustment, verify whether the threshold meets the requirements through the display interface of the pressure detection valve 1 (or an external pressure gauge). According to the actual required length of the connecting cable 2, first pass the free end of the cable through the gap between the cable body pressure plate 7 and the auxiliary baffle 6, and then orderly wind the excess length of cable from bottom to top along the trapezoidal thread groove of the threaded winding rod 5. Turn the operating knob 10 clockwise to rotate the threaded winding rod 5 clockwise. Due to the limiting effect of the sliding block 9 and the sliding groove 8, the cable pressure plate 7 moves vertically upward along the threaded winding rod 5 until the rubber pad 11 is tightly attached to the wound cable. At this point, stop turning the knob. The rubber pad 11 presses the cable tightly through elastic deformation to prevent the cable from loosening during equipment operation. You can slightly pull the free end of the cable to confirm the pressing effect. If you need to extend the cable length, turn the operating knob 10 counterclockwise to rotate the threaded winding rod 5 counterclockwise. The cable pressure plate 7 moves downward vertically and releases the cable from the pressure. After releasing the desired length of cable from the threaded winding rod 5, turn the operating knob 10 clockwise again to make the cable pressure plate 7 press the cable again, completing the length adjustment.

Claims

1. A pressure detectable relief valve comprising a relief valve body, characterized by: The overflow valve body includes a valve body (17), wherein an upper flow hole (19) and a lower flow hole (20) are provided on the side of the valve body (17), wherein the upper flow hole (19) and the lower flow hole (20) are arranged vertically, and an adjustment through hole (18) is also included. The adjustment through hole (18) is connected to the upper flow hole (19), and an adjustment plug (23) is threadedly connected to the port of the adjustment through hole (18). A return spring (22) is rotatably installed at the port of the adjustment plug (23), and a sealing plug (21) is fixedly connected to the other end of the return spring (22). The sealing plug (21) is plugged into the port of the upper flow hole (19). Both the upper flow hole (19) and the lower flow hole (20) are equipped with connecting pipes (16). The connecting pipe (16) installed with the upper flow hole (19) is the outlet, and the connecting pipe (16) installed with the lower flow hole (20) is the inlet. A pressure detection valve (1) is installed on the inlet. A connecting cable (2) is provided on the top of one side of the pressure detection valve (1). When the pressure of the connecting pipe (16) installed with the lower flow hole (20) is greater than the elastic force of the return spring (22), the sealing plug (21) will not block the lower flow hole (20). The upper flow hole (19) and the lower flow hole (20) are connected.

2. The pressure-detectable overflow valve according to claim 1, characterized in that: A take-up mechanism is provided on one side of the connecting cable (2). The take-up mechanism includes a threaded winding rod (5). An upper fixing block (3) is rotatably connected to the outer surface of one end of the threaded winding rod (5). A lower fixing block (4) is rotatably installed at the other end of the threaded winding rod (5). The bottoms of the upper fixing block (3) and the lower fixing block (4) are fixedly connected to the valve body (17).

3. The pressure-detectable overflow valve according to claim 2, characterized in that: The bottom of the upper fixing block (3) and the top side of the lower fixing block (4) are fixedly connected to the same auxiliary baffle (6), and the outer surface of the threaded winding rod (5) is threadedly connected to the wire pressure plate (7), and one side of the wire pressure plate (7) is in contact with one side of the auxiliary baffle (6).

4. The pressure-detectable overflow valve according to claim 3, characterized in that: A sliding groove (8) is provided on one side of the auxiliary baffle (6), and a sliding block (9) is fixedly connected to one side of the line pressure plate (7). The outer surface of the sliding block (9) is slidably connected to the inner wall of the sliding groove (8).

5. The pressure-detectable spill valve of claim 4, wherein: One end of the threaded winding rod (5) is fixedly connected to an operating knob (10), and the outer surface of the operating knob (10) is provided with a protrusion.

6. The pressure-detectable overflow valve according to claim 3, wherein: A rubber pad (11) is provided on one side of the wire pressure plate (7), and the inner wall of the rubber pad (11) is slidably connected to the outer surface of the threaded winding rod (5).

7. A pressure detectable spill valve according to claim 6 wherein: The outer surfaces of the two connecting pipe ports (16) are provided with a reinforcing mechanism, which includes a rubber sleeve (12). The rubber sleeve (12) is interference-fitted onto the outer surface of the connecting pipe port (16). A rubber support pad (13) is uniformly fixedly connected to the outer surface of one end of the rubber sleeve (12). The vertical cross section of the rubber support pad (13) is triangular. Several rubber support pads (13) are all arranged on one side of the auxiliary ring. The inner wall of the auxiliary ring is fixedly connected to the outer surface of one end of the connecting pipe. The rubber sleeve (12) can be used to support the connection of the connecting pipe port (16) to prevent the connecting pipe port (16) from bending excessively.

8. The pressure-detectable spill valve of claim 7, wherein: The outer surface of the rubber support pad (13) is fixedly connected to the mounting plate (14), and the inner wall of the mounting plate (14) is provided with a fixing bolt (15), which is threaded into the inner wall of the auxiliary ring.

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