A marine fire valve with a double-sealing structure

Abstract

This invention relates to the field of fire valve technology, specifically to a marine fire valve with a double-sealing structure. It includes a fire valve body with a ball cavity containing a spherical valve. One side of the spherical valve blocks a transverse cavity in the fire valve body, and the adjacent side of the spherical valve blocks a vertical cavity. Both sides of the spherical valve are connected to directional shafts for rotation, and each directional shaft corresponds to a worm gear. The fire valve body has a manually adjustable main shaft. The fire valve has two pipe ports, each with a valve to restrict unidirectional fluid flow. Fluid flowing through the fire valve in any direction can be intercepted. By controlling the ball valve to rotate half a turn, an L-shaped water pipe connects the transverse and vertical cavities, thus opening the fire valve passage and allowing fluid to be delivered.

Description

Technical Field

[0001] This invention relates to the field of fire valve technology, specifically a marine fire valve with a double-sealing structure. Background Technology

[0002] Fire valves are key accessories for controlling the flow of fluids in industrial and building pipelines. They mainly consist of a valve body, an opening and closing mechanism, and a valve cover, and are characterized by simple structure and reliable sealing. Common types include fire signal butterfly valves, rising stem resilient seated gate valves, water flow indicators, and wet alarm valves.

[0003] Both external pipe ports on the fire valve are equipped with unidirectional flow guidance structures. This ensures that regardless of whether the fluid flows through the fire valve in the forward or reverse direction, there will always be a unidirectional flow guidance structure to block it. The fire valve can restrict and intercept fluid flowing in any direction. The principle of the unidirectional flow guidance structure is to cover the pipe port in the fire valve with a baffle. When the fluid injected into the fire valve flows out, it will impact the baffle, making the baffle more stable at the pipe port. The existing technology adds an elastic pressure mechanism on the other side of the baffle to ensure that there is sufficient pressure between the baffle and the pipe port for contact sealing.

[0004] Springs or spring sheets that apply elastic pressure will gradually soften and fatigue over time, causing the pressure applied to the baffle to gradually decrease, resulting in fluid leakage between the baffle and the pipe port. How to replace the springs or spring sheets in a timely manner to ensure that the baffle always receives sufficient elastic pressure is a problem that needs to be solved through research and development. To address this, the present invention provides a marine fire valve with a double-sealing structure. Summary of the Invention

[0005] The purpose of this invention is to provide a marine fire valve with a double-sealing structure to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a marine fire valve with a double-sealing structure, comprising a fire valve body, a ball cavity being formed in the fire valve body, and a spherical valve device being disposed within the ball cavity. One side of the spherical valve device blocks a transverse cavity formed in the fire valve body, and the adjacent side of the spherical valve device blocks a vertical cavity formed in the fire valve body. Both sides of the spherical valve device are connected to a directional shaft for driving its rotation. Each directional shaft has a corresponding worm gear for transmission on one side. A manually adjustable main shaft is provided in the fire valve body. One end of the worm gear has a helical gear meshing with a gear fixed on the directional shaft, and the other end of the worm gear meshes with a gear fixed at the end of the main shaft via a shaft gear. The spherical valve device includes:

[0007] The ball stand, the directional shaft drives the ball stand to rotate through a fixed connection with the ball stand;

[0008] An L-shaped water pipe is fixed inside the ball frame, and the L-shaped water pipe connects the horizontal and vertical pipe cavities to enable the fire valve to deliver fluid;

[0009] Two gates are installed outside the ball frame, and the two gates are used to block the ports of the horizontal and vertical pipe cavities respectively. The ball frame controls whether drainage is between the horizontal and vertical pipe cavities by rotating half a circle.

[0010] Two collectors are installed in the ball frame, each collector collecting the discharge power from a corresponding door.

[0011] The ball frame is equipped with spring ring devices on both sides. The two ends of the moving device are respectively connected to the two spring ring devices, and the spring ring devices are set in the notch space opened on the side of the ball frame.

[0012] The door fixtures include:

[0013] The door body includes a square door arc plate and a directional slider disposed in the middle of the square door arc plate, and a through-tube cavity is opened in the middle of the door body;

[0014] A pressure-blocking disc with a movable cover at the drain port of the narrow tube cavity, and a pressure spring for pressing the pressure-blocking disc, with the end of the pressure spring fixed to the door body.

[0015] One end of the door directional slider is slidably inserted into the square groove opened on the ball frame, and a branch tube cavity is opened in the ball frame with one end connected to the square groove. The other end of the branch tube cavity impacts the actuating device by draining water.

[0016] The actuating device includes a conversion component impacted by the drainage of the branch tube cavity, an output shaft for driving the spring ring device, and a force amplifying component for transmission between the output shaft and the conversion component. A portion of the output shaft is movably sleeved in a through hole opened on a protrusion on the ball frame.

[0017] The conversion component includes an inner frame fixed on the ball frame, a horizontal short shaft, a vertical short shaft, and a booster worm gear supported on the inner frame, as well as a wind turbine fixed at one end of the booster worm gear. One end of the vertical short shaft meshes with the booster worm gear for transmission through a fixed gear, and the other end of the vertical short shaft is driven by a fixed bevel gear to change direction with a bevel gear fixed at the end of the horizontal short shaft.

[0018] The wind turbine includes an annular cylinder, multiple inclined plates evenly arranged on the inner wall of the annular cylinder, and a back frame fixed on the bottom surface of the annular cylinder. The wind turbine back frame and the booster worm gear are fixedly connected. The drainage of the branch tube cavity impacts the inclined plates of the wind turbine to cause the wind turbine to rotate.

[0019] The force-enhancing component includes a central shaft that is movably sleeved in a shaft hole on the inner frame, a mainspring that is fixedly sleeved on the central shaft, an outer gear ring that is fixedly sleeved on the outside of the mainspring, and a back plate fixed to one side of the outer gear ring.

[0020] The central shaft is also movably fitted into a through hole in the middle of the back plate. One end of the central shaft is driven by a fixed bevel gear to change direction with a ring bevel gear fixed on the lead-out shaft, and the end of the transverse short shaft is driven by a fixed gear to mesh with an external gear ring.

[0021] The spring ring device includes a ring plate frame, multiple edge blocks evenly arranged around the outside of the ring plate frame, multiple J-shaped spring pieces fixed around the ring plate frame, and multiple spring assemblies evenly arranged around the ring plate frame, with some spring assemblies contacting and supporting the door body.

[0022] The edge block is fixed on the ball frame, and the edge of the ring plate frame is engaged in the arc-shaped groove opened on the edge block. The ring plate frame is equipped with an internal gear ring to mesh with the gear fixed at the end of the lead-out shaft. One end of each edge block is intercepted by a J-shaped spring.

[0023] The spring assembly includes a dividing block fixed on the ring plate frame, a guide push rod that slides through a circular hole in the middle of the dividing block, a U-shaped frame that contacts one end of the guide push rod, and a spring sleeved on the guide push rod. A retaining ring is fixed on the guide push rod, and the spring is supported between the retaining ring and the dividing block. The U-shaped frame is partially inserted into a groove in the dividing block.

[0024] Compared with the prior art, the beneficial effects of the present invention are:

[0025] 1. The fire valve of the present invention has two pipe ports, and a valve is set at each pipe port to restrict the unidirectional flow of fluid. Fluid flowing through the fire valve in any direction can be intercepted. By controlling the ball frame to rotate half a circle, the L-shaped water pipe is connected between the horizontal and vertical pipe chambers, so that the fire valve passage is opened and the fire valve can deliver fluid.

[0026] 2. Over time, the spring assembly supporting the door will experience elastic fatigue. Subsequently, the sealing performance of the door to the pipe port will decrease, causing fluid leakage. At the same time, fluid will enter the ball cavity inside the fire valve. The fluid will impact the actuator, which will collect the power and use the collected power to drive the spring ring device. A new spring assembly will replace the fatigued spring assembly to continue to apply pressure to the door, so that the door can re-seal the pipe port firmly. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of the present invention.

[0028] Figure 2 This is a schematic diagram of the internal structure of the present invention.

[0029] Figure 3 This is a schematic diagram showing the position of the ball valve.

[0030] Figure 4 This is a schematic diagram of a ball valve.

[0031] Figure 5 This is a schematic diagram showing the location of the L-shaped water pipe.

[0032] Figure 6 This is a schematic diagram of the door structure.

[0033] Figure 7 This is a schematic diagram of the integrated drive device.

[0034] Figure 8 This is a schematic diagram of the door's location.

[0035] Figure 9 This is a schematic diagram of the conversion component.

[0036] Figure 10 This is a schematic diagram of the door structure.

[0037] Figure 11 This is a schematic diagram of the force-enhancing component.

[0038] Figure 12 This is a schematic diagram of the spring ring device.

[0039] Figure 13 This is a schematic diagram of the spring assembly structure.

[0040] Figure 14 This is a schematic diagram of the U-shaped frame location.

[0041] In the diagram: 1. Fire valve body; 2. Ball valve; 3. Horizontal cavity; 4. Vertical cavity; 5. Adjusting shaft; 6. Main shaft; 7. Introducing worm gear; 8. Ball frame; 801. Branch thin cavity; 9. L-shaped water pipe; 10. Door; 11. Aggregating device; 12. Spring ring device; 13. Door body; 131. Through thin cavity; 14. Pressure spring plate; 15. Pressure plug plate; 16. Converter; 17. Force amplifying component; 18. Lead-out shaft; 19. Horizontal short shaft; 20. Fan wheel; 21. Inner frame; 22. Vertical short shaft; 23. Pressure boosting worm gear; 24. External gear ring; 25. Spring; 26. Central shaft; 27. Back plate; 28. Side block; 29. ​​Ring plate frame; 30. Spring assembly; 31. J-type spring plate; 32. U-shaped frame; 33. Spring; 34. Separating block; 35. Guide push rod. Detailed Implementation

[0042] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the technical solutions of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0043] Please see Figures 1 to 14This invention provides a technical solution: a marine fire valve with a double-sealing structure, comprising a fire valve body 1, a ball cavity in the fire valve body 1, and a ball valve 2 disposed in the ball cavity. One side of the ball valve 2 blocks a transverse cavity 3 in the fire valve body 1, and the adjacent side of the ball valve 2 blocks a vertical cavity 4 in the fire valve body 1. Both sides of the ball valve 2 are connected to a directional shaft 5 for driving its rotation. Each directional shaft 5 has a corresponding worm gear 7 on one side. The fire valve body 1 is provided with a manually adjustable main shaft 6. One end of the worm gear 7 is equipped with helical teeth to mesh with a gear fixed on the directional shaft 5, and the other end of the worm gear 7 is equipped with a shaft gear to mesh with a gear fixed at the end of the main shaft 6. The ball valve 2 includes:

[0044] The ball frame 8 and the adjusting shaft 5 are fixedly connected to the ball frame 8 to drive the ball frame 8 to rotate;

[0045] The L-shaped water pipe 9 is fixed inside the ball frame 8. The L-shaped water pipe 9 connects the horizontal pipe cavity 3 and the vertical pipe cavity 4 to realize the fire valve to deliver fluid.

[0046] Two door fixtures 10 are installed outside the ball frame 8, and the two door fixtures 10 are used to block the ports of the horizontal tube 3 and the vertical tube 4 respectively. The ball frame 8 switches between whether the horizontal tube 3 and the vertical tube 4 are drained by rotating half a circle.

[0047] Two collectors 11 are installed in the ball frame 8, each collector 11 collecting the discharge power at a door 10;

[0048] The ball frame 8 is provided with spring ring devices 12 on both sides. The two ends of the moving device 11 are respectively connected to the two spring ring devices 12 for transmission, and the spring ring devices 12 are located in the notch space opened on the side of the ball frame 8.

[0049] refer to Figure 5 The L-shaped water pipe 9 connects the horizontal pipe cavity 3 and the vertical pipe cavity 4. At this time, the fire valve is in the state of conveying fluid. To close the fire valve, turn the handle connected to the main shaft 6. The rotation of the main shaft 6 drives the worm gear 7, which in turn drives the ball frame 8 to rotate half a turn, so that one door 10 blocks the port of the horizontal pipe cavity 3 and the other door 10 blocks the port of the vertical pipe cavity 4. In this way, the fire valve is closed, which can block the bidirectional fluid.

[0050] refer to Figure 6 Understood, door fixture 10 includes:

[0051] Door body 13, including a square door arc plate and a directional slider in the middle of the square door arc plate, and a through thin tube cavity 131 is opened in the middle of the door body 13;

[0052] A pressure plate 15 with a movable cover at the drain port of the thin tube cavity 131, and a pressure spring 14 for pressing the pressure plate 15, the end of the pressure spring 14 being fixed to the door body 13.

[0053] refer to Figure 6 Understand that one end of the slider in the direction of the door body 13 is slidably inserted into the square groove opened on the ball frame 8, and a branch tube cavity 801 with one end connected to the square groove is opened in the ball frame 8. The other end of the branch tube cavity 801 impacts the actuating device 11 by draining water.

[0054] The fire valve closes via two valves 13. One valve 13 blocks the horizontal cavity 3, and the other valve 13 blocks the vertical cavity 4. If fluid flows out through the horizontal cavity 3, it will be intercepted by the valve 13 at the port of the horizontal cavity 3. Similarly, if fluid flows out through the vertical cavity 4, it will be intercepted by the valve 13 at the port of the vertical cavity 4. This allows the fire valve to intercept fluid flowing in either direction. If a leak occurs between the port of the vertical cavity 4 and the covered valve 13, the fluid in the fire valve's ball cavity will be discharged through the vertical cavity 4, while external fluid will be injected into the ball cavity through the horizontal cavity 3. This fluid injection will preferentially occur through the through-through narrow tube 131 at the port of the horizontal cavity 3, because both sides of the valve 13 at the port of the horizontal cavity 3 are... Supported by the spring ring device 12, there is no leakage between the transverse cavity 3 and the door body 13 at the port. The fluid in the transverse cavity 3 is injected into the square groove on the ball frame 8 through the through-through thin tube 131, and then discharged into the ball cavity through the branch thin tube 801. When discharged, it will impact the actuating device 11. In summary, when the vertical cavity 4 is the fluid discharge end of the fire valve, leakage between the port of the vertical cavity 4 and the door body 13 will cause the fluid to be transported in a directional manner at the port of the transverse cavity 3, and then the actuating device 11 will collect the power of the fluid. Conversely, when the transverse cavity 3 is the fluid discharge end of the fire valve, leakage between the port of the transverse cavity 3 and the door body 13 will cause the fluid to be transported in a directional manner at the port of the vertical cavity 4, and the power of the impact will be applied to the actuating device 11 at the port of the vertical cavity 4.

[0055] refer to Figure 7 It is understood that the actuating device 11 includes a conversion element 16 impacted by the drainage of the branch tube cavity 801, an output shaft 18 for driving the spring ring device 12, and a force amplifying element 17 for transmission between the output shaft 18 and the conversion element 16. A portion of the output shaft 18 is movably sleeved in a through hole opened on a protrusion on the ball frame 8.

[0056] refer to Figure 9The converter 16 includes an inner frame 21 fixed on the ball frame 8, a horizontal short shaft 19, a vertical short shaft 22 and a booster worm gear 23 supported on the inner frame 21, and a windmill 20 fixed to one end of the booster worm gear 23. One end of the vertical short shaft 22 meshes with the booster worm gear 23 for transmission through a fixed gear, and the other end of the vertical short shaft 22 drives the bevel gear fixed to the end of the horizontal short shaft 19 for direction-changing transmission through a fixed bevel gear. The horizontal short shaft 19, the vertical short shaft 22 and the booster worm gear 23 are respectively movably sleeved in different through holes opened on the inner frame 21.

[0057] The impeller 20 includes an annular cylinder, multiple inclined plates evenly arranged on the inner wall of the annular cylinder, and a back frame fixed on the bottom surface of the annular cylinder. The back frame of the impeller 20 and the pressure boosting worm gear 23 are fixedly connected. The drainage of the branch tube cavity 801 impacts the inclined plates of the impeller 20 to cause the impeller 20 to rotate.

[0058] The force-enhancing component 17 includes a central shaft 26 movably sleeved in a shaft hole on the inner frame 21, a mainspring 25 fixedly sleeved on the central shaft 26, an outer gear ring 24 fixedly sleeved on the outside of the mainspring 25, and a back plate 27 fixed on one side of the outer gear ring 24.

[0059] The central shaft 26 is also movably sleeved in the through hole in the middle of the back plate 27. One end of the central shaft 26 is driven by a fixed bevel gear to change direction with the ring bevel gear fixed on the lead-out shaft 18, and the end of the transverse short shaft 19 is driven by a fixed gear to mesh with the external gear ring 24.

[0060] The spring ring device 12 includes a ring plate frame 29, a plurality of edge blocks 28 evenly arranged around the outside of the ring plate frame 29, a plurality of J-shaped spring pieces 31 fixed around the ring plate frame 29, and a plurality of spring assemblies 30 evenly arranged around the ring plate frame 29, with some spring assemblies 30 contacting the supporting door body 13.

[0061] The edge block 28 is fixed on the ball frame 8, and the edge of the ring plate frame 29 is engaged in the arc-shaped groove opened on the edge block 28. The ring plate frame 29 is connected to the gear fixed at the end of the lead-out shaft 18 by setting an internal gear ring. One end of each edge block 28 is intercepted by a J-shaped spring piece 31.

[0062] The spring assembly 30 includes a dividing block 34 fixed on the ring plate frame 29, a guide push rod 35 that slides through a circular hole in the middle of the dividing block 34, a U-shaped frame 32 that one end of the guide push rod 35 contacts, and a spring 33 fitted on the guide push rod 35. A retaining ring is fixed on the guide push rod 35, and the spring 33 is supported between the retaining ring and the dividing block 34. The U-shaped frame 32 is partially inserted into a groove in the dividing block 34.

[0063] Leakage occurs between the transverse cavity 3 and the gate 13 at the port, or between the vertical cavity 4 and the gate 13 at the port. The main reason is the decrease in the elastic force applied by the spring assembly 30. The spring 33 in the spring assembly 30 is constantly compressed, leading to fatigue. A new spring assembly 30 needs to be replaced to push the gate 13 and restore the elastic pressure received by the gate 13. As mentioned before, the leakage problem will cause the drainage at the branch cavity 801 to impact the impeller 20. The impeller 20 rotates to drive the booster worm 23, which then drives the transverse short shaft 19 through the vertical short shaft 22. Next, the external gear ring 24 rotates, causing the spring 25 to contract and store force. When the stored pressure is sufficient, that is, when the spring breaks... When the J-shaped spring 31 and the edge block 28 are locked together, the spring 25 releases power to cause the central shaft 26 to rotate. Then, the transmission ring plate frame 29 is driven through the lead-out shaft 18. The rotation of the ring plate frame 29 drives all the spring assemblies 30 to rotate. In this way, the new spring assembly 30 is used to support the door body 13, while the fatigued spring assembly 30 of the internal spring 33 is transferred away. The new spring assembly 30 applies sufficient pressure to the door body 13, so that the leaking part of the door body 13 can re-stable and seal the port of the cavity. Here, the ring plate frame 29 can continue to rotate, allowing more fatigued springs 33 to be replaced until the leakage problem is completely solved. The replaced springs 33 automatically extend again and gradually restore their normal elasticity.

[0064] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A marine fire valve with a double-sealing structure, comprising a fire valve body, characterized in that: The fire valve body has a ball cavity, and a spherical valve is installed in the ball cavity. One side of the spherical valve blocks the horizontal cavity in the fire valve body, and the adjacent side of the spherical valve blocks the vertical cavity in the fire valve body. Both sides of the spherical valve are connected to a directional shaft for driving its rotation. Each directional shaft has a corresponding worm gear on one side. The fire valve body has a manually adjustable main shaft. One end of the worm gear has a helical gear that meshes with a gear fixed on the directional shaft, and the other end of the worm gear meshes with a gear fixed at the end of the main shaft via a shaft gear. The spherical valve includes: The ball stand, the directional shaft drives the ball stand to rotate through a fixed connection with the ball stand; An L-shaped water pipe is fixed inside the ball frame, and the L-shaped water pipe connects the horizontal and vertical pipe cavities to enable the fire valve to deliver fluid; Two gates are installed outside the ball frame, and the two gates are used to block the ports of the horizontal and vertical pipe cavities respectively. The ball frame controls whether drainage is between the horizontal and vertical pipe cavities by rotating half a circle. Two collectors are installed in the ball frame, each collector collecting the discharge power from a corresponding door. The ball frame is equipped with spring ring devices on both sides. The two ends of the moving device are respectively connected to the two spring ring devices, and the spring ring devices are set in the notch space opened on the side of the ball frame. The door fixtures include: The door body includes a square door arc plate and a directional slider disposed in the middle of the square door arc plate, and a through-tube cavity is opened in the middle of the door body; A pressure-blocking plate with a movable cover at the drain port of the narrow tube cavity, and a pressure spring sheet for pressing the pressure-blocking plate, with the end of the pressure spring sheet fixed to the door body; One end of the door direction slider is slidably inserted into the square groove opened on the ball frame, and a branch tube cavity is opened in the ball frame with one end connected to the square groove. The other end of the branch tube cavity impacts the actuating device by draining water. The actuating device includes a conversion component impacted by the drainage of the branch tube cavity, an outlet shaft for driving the spring ring device, and a force amplifying component for transmission between the outlet shaft and the conversion component. A portion of the outlet shaft is movably sleeved in a through hole opened on a protrusion on the ball frame. The actuating device collects power and then uses the collected power to drive the spring ring device. A new spring assembly replaces the fatigued spring assembly to continue applying pressure to the door.

2. A marine fire valve with a double-sealing structure according to claim 1, characterized in that: The conversion component includes an inner frame fixed on the ball frame, a horizontal short shaft, a vertical short shaft, and a booster worm gear supported on the inner frame, as well as a wind turbine fixed at one end of the booster worm gear. One end of the vertical short shaft meshes with the booster worm gear for transmission through a fixed gear, and the other end of the vertical short shaft is driven by a fixed bevel gear to change direction with a bevel gear fixed at the end of the horizontal short shaft.

3. A marine fire valve with a double-sealing structure according to claim 2, characterized in that: The wind turbine includes an annular cylinder, multiple inclined plates evenly arranged on the inner wall of the annular cylinder, and a back frame fixed on the bottom surface of the annular cylinder. The wind turbine back frame and the booster worm gear are fixedly connected. The drainage of the branch tube cavity impacts the inclined plates of the wind turbine to cause the wind turbine to rotate.

4. A marine fire valve with a double-sealing structure according to claim 2, characterized in that: The force-enhancing component includes a central shaft that is movably sleeved in a shaft hole on the inner frame, a mainspring that is fixedly sleeved on the central shaft, an outer gear ring that is fixedly sleeved on the outside of the mainspring, and a back plate fixed to one side of the outer gear ring.

5. A marine fire valve with a double-sealing structure according to claim 4, characterized in that: The central shaft is also movably fitted into a through hole in the middle of the back plate. One end of the central shaft is driven by a fixed bevel gear to change direction with a ring bevel gear fixed on the lead-out shaft, and the end of the transverse short shaft is driven by a fixed gear to mesh with an external gear ring.

6. A marine fire valve with a double-sealing structure according to claim 1, characterized in that: The spring ring device includes a ring plate frame, multiple edge blocks evenly arranged around the outside of the ring plate frame, multiple J-shaped spring pieces fixed around the ring plate frame, and multiple spring assemblies evenly arranged around the ring plate frame, with some spring assemblies contacting and supporting the door body.

7. A marine fire valve with a double-sealing structure according to claim 6, characterized in that: The edge block is fixed on the ball frame, and the edge of the ring plate frame is engaged in the arc-shaped groove opened on the edge block. The ring plate frame is equipped with an internal gear ring to mesh with the gear fixed at the end of the lead-out shaft. One end of each edge block is intercepted by a J-shaped spring.

8. A marine fire valve with a double-sealing structure according to claim 6, characterized in that: The spring assembly includes a dividing block fixed on the ring plate frame, a guide push rod that slides through a circular hole in the middle of the dividing block, a U-shaped frame that contacts one end of the guide push rod, and a spring sleeved on the guide push rod. A retaining ring is fixed on the guide push rod, and the spring is supported between the retaining ring and the dividing block. The U-shaped frame is partially inserted into a groove in the dividing block.

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