A water pump adapter pressure detection device

Abstract

This utility model relates to the field of testing, and in particular to a pressure testing device for a water pump connector; it includes a first connecting terminal, a height detection component fixedly installed on the bottom and outer side of the first connecting terminal, a support component fixedly installed on the bottom of the height detection component, a stabilizing component fixedly installed on one side of the support component and the outer surface of the height detection component; a positioning component slidably installed on the outer surface of the height detection component, a positioning component fixedly installed on one side and the bottom of the height detection component, and a limiting component fixedly installed on one side and the outer surface of the height detection component; it solves the technical problems of inconvenience in adjusting the usage height and inconvenience in adjusting the usage position.

Description

Technical Field

[0001] This utility model relates to the field of testing, and in particular to a pressure testing device for a water pump connection. Background Technology

[0002] In the field of testing, in order to ensure the safety and reliability of the water pump connection in the system, the water pressure of the water pump connection must be tested. When testing the water pressure of the water pump connection, a water pump connection pressure testing device is often required.

[0003] In the prior art, when using this device to test the water pressure of a water pump connection, it is difficult to adjust the height of the device since the height is generally fixed. This increases the difficulty of adjusting the height. Furthermore, before using this device to test the water pressure of a water pump connection, it is difficult to adjust the position of the device since the position is generally fixed. This increases the difficulty of adjusting the position of the device. Utility Model Content

[0004] This invention provides a water pump coupling pressure detection device to solve the problems of inconvenience in adjusting the height and position of the device in the prior art. The device allows for convenient adjustment of both the height and position of the device.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a water pump connector pressure detection device, comprising a first connecting terminal, a detection height component for detecting water pressure of the water pump connector and facilitating height adjustment, fixedly installed on the bottom and outer side of the first connecting terminal, a support component for supporting the detection height component, a stabilizing component for increasing the stability of the detection height component, a positioning component for facilitating adjustment of the use position of the detection height component, a positioning component for positioning the positioning component, fixedly installed on one side and the bottom of the detection height component, and a limiting component for limiting the positioning component, fixedly installed on one side and the outer surface of the detection height component.

[0006] Furthermore, the height-adjustable testing component includes an electric telescopic rod and a portal-shaped support plate. The top of the electric telescopic rod is fixedly installed at the bottom of the first connecting terminal. The inside of the portal-shaped support plate is fixedly installed on the outer side of the first connecting terminal. A U-shaped handle is fixedly connected to the top of the portal-shaped support plate. The electric telescopic rod is fixedly connected to the portal-shaped support plate. A connecting plate is fixedly connected to the telescopic end of the electric telescopic rod. A water tank body is fixedly connected to the bottom of the connecting plate. A pressure gauge, a disc filter, a second connecting terminal, and a water inlet pipe are fixedly connected together inside the top of the water tank body and inside the connecting plate. A sealing plug is threaded onto the outer side of the top of the water inlet pipe. A water pump body is fixedly connected to the inner bottom wall of the water tank body. A rigid wire is fixedly connected to the top of the water pump body. One end of the rigid wire is fixedly installed inside the tank body and inside the connecting plate. A rigid curved pipe is fixedly connected to the water delivery end of the water pump body. The rigid curved pipe is fixedly connected to the water tank body.

[0007] Furthermore, the support assembly includes a support plate, the top of which is fixedly installed at the bottom of the water tank body, and the support plate is slidably installed inside the portal-shaped support plate. The front and rear sides of the support plate are jointly fixedly connected to a first loop-shaped long plate, which is slidably connected to the portal-shaped support plate.

[0008] Furthermore, the stabilizing component includes a positioning long plate and a second loop-shaped long plate. One side of the positioning long plate is fixedly installed on one side of the supporting horizontal plate. The interior of the second loop-shaped long plate is fixedly installed on the front and rear sides of the main body of the water storage tank. The positioning long plate is slidably installed inside the plate of the gate-shaped support plate. The second loop-shaped long plate is slidably connected to the gate-shaped support plate.

[0009] Furthermore, the toilet assembly includes a gate-shaped long plate, the interior of which is slidably installed on the bottom and one side of the gate-shaped support plate. Multiple threaded grooves are opened on one side of the gate-shaped long plate, and a connecting long plate is fixedly connected to the other side of the gate-shaped long plate.

[0010] Furthermore, the positioning component includes a convex long rod and a trapezoidal long rod. One side of the convex long rod is fixedly installed on one side of the portal-shaped support plate, and the top of the trapezoidal long rod is fixedly installed on the bottom of the portal-shaped support plate. Both the convex long rod and the trapezoidal long rod are slidably installed inside the portal-shaped support plate.

[0011] Furthermore, the limiting component includes a first L-shaped plate and a second L-shaped plate. One side of the first L-shaped plate is fixedly installed on one side of the gate-shaped support plate, and the interior of the second L-shaped plate is fixedly installed on one side and the other side of the gate-shaped support plate, respectively. Both the first L-shaped plate and the second L-shaped plate are slidably connected to the gate-shaped long plate, and the interior of the first L-shaped plate is threaded with a limiting screw.

[0012] The working principle and usage principle of this utility model are as follows: During the use of this device, through the setting of the first connecting terminal, the height detection component, the support component, and the stabilization component, this device can perform water pressure detection on the water pump connector. When using this device to perform water pressure detection on the water pump connector, if the usage height needs to be adjusted, the usage height of this device can be changed, thus avoiding the difficulty of adjusting the usage height due to its difficulty in adjustment, and making the usage height easy to adjust. Furthermore, during the use of this device, through the setting of the positioning component, the positioning component, and the limiting component, before using this device to perform water pressure detection on the water pump connector, if the usage position needs to be adjusted, the usage position of this device can be changed, thus avoiding the difficulty of adjusting the usage position due to its difficulty in adjustment, and making the usage position easy to adjust.

[0013] The beneficial technical effects of this utility model are:

[0014] By incorporating the first connection terminal, the height detection component, the support component, and the stabilization component, this device can perform water pressure detection on the water pump connector. When using this device to perform water pressure detection on the water pump connector, the device's operating height can be adjusted as needed, allowing for easy and convenient height adjustment. Furthermore, by incorporating the positioning component, the positioning component, and the limiting component, the device's operating position can be adjusted as needed before performing water pressure detection on the water pump connector, allowing for easy and convenient position adjustment. Attached Figure Description

[0015] Figure 1 This is a frontal perspective three-dimensional schematic diagram of the present invention;

[0016] Figure 2 This is a three-dimensional schematic diagram of the door-shaped long plate of this utility model;

[0017] Figure 3 This is a rear-view perspective view of the present invention;

[0018] Figure 4 This is a frontal sectional view of the present invention;

[0019] Figure 5 This is a side sectional view of the present invention.

[0020] Explanation of reference numerals in the attached drawings: 1. U-shaped handle; 2. Gate-shaped support plate; 3. Convex long rod; 4. Trapezoidal long rod; 5. Connecting long plate; 6. Threaded groove; 7. Gate-shaped long plate; 8. Limiting screw; 9. First L-shaped plate; 10. Second L-shaped plate; 11. Rigid curved tube; 12. First U-shaped long plate; 13. Second U-shaped long plate; 14. Water tank body; 15. Connecting plate; 16. Inlet pipe; 17. Pressure gauge; 18. Disc-shaped filter screen; 19. Sealing plug; 20. Second connecting terminal; 21. Electric telescopic rod; 22. First connecting terminal; 23. Supporting cross plate; 24. Positioning long plate; 25. Rigid wire; 26. Water pump body. Detailed Implementation

[0021] To make the technical means, creative features, objectives and effects of the embodiments of this application easier to understand, the embodiments of this application are further described below in conjunction with the figures and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the embodiments of this application and are not intended to limit the embodiments of this application.

[0022] Example 1: As Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5As shown: A water pump connection pressure detection device includes a first connecting terminal 22, an electric telescopic rod 21, a portal-shaped support plate 2, a supporting cross plate 23, a positioning long plate 24, and a second U-shaped long plate 13. A height-adjustable detection assembly for detecting the water pressure of the water pump connection is fixedly installed on the bottom and outer side of the first connecting terminal 22. The height-adjustable detection assembly includes the electric telescopic rod 21 and the portal-shaped support plate 2. The top of the electric telescopic rod 21 is fixedly installed on the bottom of the first connecting terminal 22. The interior of the portal-shaped support plate 2 is fixedly installed on the outer side of the first connecting terminal 22. A U-shaped handle 1 is fixedly connected to the top of the portal-shaped support plate 2. The electric telescopic rod 21 is fixedly connected to the portal-shaped support plate 2. The telescopic end of the electric telescopic rod 21... A connecting plate 15 is fixedly connected, and a water storage tank body 14 is fixedly connected to the bottom of the connecting plate 15. A pressure gauge 17, a disc filter 18, a second connecting terminal 20, and a water inlet pipe 16 are fixedly connected together inside the top of the water storage tank body 14 and inside the connecting plate 15. A sealing plug 19 is threaded onto the outer side of the top of the water inlet pipe 16. A water pump body 26 is fixedly connected to the inner bottom wall of the water storage tank body 14. A rigid wire 25 is fixedly connected to the top of the water pump body 26. One end of the rigid wire 25 is fixedly installed inside the water storage tank body 14 and inside the connecting plate 15. A rigid curved pipe 11 is fixedly connected to the water delivery end of the water pump body 26. The rigid curved pipe 11 is fixedly connected to the water storage tank body 14. The bottom of the height detection component is fixedly installed. A support assembly for the height detection component is provided. The support assembly includes a support horizontal plate 23. The top of the support horizontal plate 23 is fixedly installed at the bottom of the water tank body 14. The support horizontal plate 23 is slidably installed inside the portal-shaped support plate 2. A first loop-shaped long plate 12 is fixedly connected to the front and rear sides of the support horizontal plate 23. The first loop-shaped long plate 12 is slidably connected to the portal-shaped support plate 2. A stabilizing component to increase the stability of the height detection component is fixedly installed on one side of the support assembly and on the outer surface of the height detection component. The stabilizing component includes a positioning long plate 24 and a second loop-shaped long plate 13. One side of the positioning long plate 24 is fixedly installed on one side of the support horizontal plate 23. The interior of the second loop-shaped long plate 13 is fixedly installed on the front and rear sides of the water tank body 14, respectively. The positioning long plate 24 is slidably installed... The second loop-shaped long plate 13 is slidably connected to the gate-shaped support plate 2 inside the plate body. Through the setting of the first connecting terminal 22, the height detection component, the support component, and the stabilizing component, the height detection component can detect the water pressure of the water pump connection and the height can be easily adjusted. The support component can support the height detection component, and the stabilizing component can increase the stability of the height detection component. This device can detect the water pressure of the water pump connection. When using this device to detect the water pressure of the water pump connection, when the height of this device needs to be adjusted, the height of this device can be changed. This device can avoid the difficulty of adjusting the height due to the difficulty of adjusting the height, and the height of this device can be easily adjusted.

[0023] In use, the initial state of this device is as follows: the sealing plug 19 is threadedly connected to the outer side of the top end of the water inlet pipe 16, the electric telescopic rod 21 is in the shortened state, and the limiting screw 8 is threadedly connected to the threaded groove 6. When it is necessary to use this device to test the water pressure of the water pump connector, move the water pump connector so that it is located directly below the main body of the water storage tank 14, so that the inlet end of the water pump connector is facing the rigid curved pipe 11. Rotate the sealing plug 19 to disengage the sealing plug 19 from the water inlet pipe 16, so that the top end of the water inlet pipe 16 is opened. Water is added into the interior of the main body of the water storage tank 14 along the opened top end of the water inlet pipe 16. After enough water is added into the main body of the water storage tank 14, the sealing plug 19 is threadedly connected to the outer side of the top end of the water inlet pipe 16, so that the top end of the water inlet pipe 16 is closed.

[0024] After the top of the inlet pipe 16 is closed, connect one end of the connecting wire to the power supply and connect the other end of the connecting wire to the first connecting terminal 22, thereby activating the electric telescopic rod 21. Under the action of the electric telescopic rod 21, the electric telescopic rod 21 extends downward, causing the connecting plate 15, the water tank body 14, the inlet pipe 16, the pressure gauge 17, the disc filter 18, and the sealing plug 19 to move. This causes the water pump body 26, the rigid curved pipe 11, the rigid wire 25, and the second connecting terminal 20 to move. This causes the second loop-shaped long plate 13, the support cross plate 23, and the first loop-shaped long plate 12 to slide along the gate-shaped support plate 2, and the positioning long plate 24 to slide along the inside of the gate-shaped support plate 2. When the rigid curved pipe 11 enters the inlet end of the water pump connector, the electric telescopic rod 21 is closed.

[0025] After the electric telescopic rod 21 is closed, one end of the other connecting wire is connected to the power supply, and the other end of the other connecting wire is connected to the second connecting terminal 20. Under the action of the rigid wire 25, the water pump body 26 is started. Under the action of the water pump body 26, the water delivery end of the water pump body 26 can transport the water inside the water storage tank body 14 along the rigid curved pipe 11 to the inlet end of the water pump connector. When the water pump connector is full of water, the water pump body 26 is closed. Under the action of the disc filter screen 18, the water storage tank body 14 can avoid negative pressure. Under the action of the pressure gauge 17, the pressure of the water delivered to the water pump connector can be displayed, so that the water pump connector can be tested for water pressure. At this time, this device can be used to test the water pressure of the water pump connector.

[0026] When using this device to test the water pressure of the water pump connection, if the device needs to adjust the operating height, the electric telescopic rod 21 is activated, causing it to extend downwards or shorten upwards. This moves the connecting plate 15, the water tank body 14, the inlet pipe 16, the pressure gauge 17, the disc filter 18, and the sealing plug 19. It also moves the water pump body 26, the rigid curved pipe 11, the rigid wire 25, and the second connecting terminal 20. This causes the second loop-shaped long plate 13, the support cross plate 23, and the first loop-shaped long plate 12 to slide along the portal support plate 2. The positioning long plate 24 slides along the inside of the portal support plate 2, allowing the operating height of the water tank body 14 to be changed. When the operating height of the water tank body 14 is the desired operating height, the electric telescopic rod 21 is closed, allowing the device to adjust the operating height.

[0027] When adjusting the operating height of this device, the following actions are taken: the connecting plate 15, the main body of the water storage tank 14, the inlet pipe 16, the pressure gauge 17, the disc filter 18, and the sealing plug 19 all move; the main body of the water pump 26, the rigid curved pipe 11, the rigid wire 25, and the second connecting terminal 20 all move; the second loop-shaped long plate 13, the supporting horizontal plate 23, and the first loop-shaped long plate 12 all slide along the portal-shaped support plate 2; and the positioning long plate 24 slides along the inside of the portal-shaped support plate 2. These actions make it easy to adjust the operating height of this device.

[0028] In summary, this device can perform water pressure testing on water pump connections. When using this device to perform water pressure testing on water pump connections, the device can be adjusted to change its operating height, thus avoiding the difficulty of adjusting the operating height and making it easy to adjust.

[0029] Example 2: Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5As shown: A water pump coupling pressure detection device includes a portal-shaped long plate 7, a convex long rod 3, a trapezoidal long rod 4, a first L-shaped plate 9, and a second L-shaped plate 10. A positioning component for easy adjustment of the usage position of the detection height component is slidably installed on the outer surface of the detection height component. The positioning component includes the portal-shaped long plate 7, which is slidably installed on the bottom and one side of a portal-shaped support plate 2. Multiple threaded grooves 6 are respectively opened on one side of the portal-shaped long plate 7. A connecting long plate 5 is fixedly connected to the other side of the portal-shaped long plate 7. Positioning components for positioning the positioning component are fixedly installed on one side and the bottom of the detection height component. The positioning components include the convex long rod 3 and the trapezoidal long rod 4. One side of the convex long rod 3 is fixedly installed on one side of the portal-shaped support plate 2, and the top of the trapezoidal long rod 4 is fixedly installed on the bottom of the portal-shaped support plate 2. Both the convex long rod 3 and the trapezoidal long rod 4 are slidably installed inside the plate body of the portal-shaped long plate 7. Limiting devices are fixedly installed on one side and the outer surface of the detection height component. The toilet placement assembly includes a limiting component comprising a first L-shaped plate 9 and a second L-shaped plate 10. One side of the first L-shaped plate 9 is fixedly installed on one side of the gate-shaped support plate 2. The interior of the second L-shaped plate 10 is fixedly installed on one side and the other side of the gate-shaped support plate 2. Both the first L-shaped plate 9 and the second L-shaped plate 10 are slidably connected to the gate-shaped long plate 7. The interior of the first L-shaped plate 9 is threaded with a limiting screw 8, which is threadedly connected to a threaded groove 6. Through the setting of the toilet placement assembly, the positioning assembly, and the limiting component, the toilet placement assembly can be easily adjusted to detect the usage position of the toilet height component, the positioning assembly can position the toilet placement assembly, and the limiting component can limit the toilet placement assembly. Before using this device to detect water pressure in the water pump connector, when the usage position of this device needs to be adjusted, the usage position of this device can be changed, thus avoiding the difficulty of adjusting the usage position due to the difficulty in adjusting the usage position, and making the usage position of this device easy to adjust.

[0030] Before using this device to test the water pressure of the water pump coupling, when the device needs to be adjusted, rotate the limiting screw 8 to disengage it from the threaded groove 6 and position one end of the limiting screw 8 inside the first L-shaped plate 9. Move the loop handle 1 so that the portal plate 2, the second L-shaped plate 10, and the first L-shaped plate 9 all slide along the portal long plate 7, and the convex long rod 3 and the trapezoidal long rod 4 slide along the inside of the portal long plate 7, so that the connecting plate 15, the water tank body 14, the water inlet pipe 16, and the pressure... The force gauge 17, disc filter 18, sealing plug 19, support plate 23, first loop-shaped long plate 12 and second loop-shaped long plate 13 all move, causing the water pump body 26, rigid curved pipe 11, rigid wire 25 and second connecting terminal 20 to move, so that the usage position of the water storage tank body 14 can be changed. When the usage position of the water storage tank body 14 is the desired usage position, and when the limiting screw 8 corresponds to the threaded groove 6, the limiting screw 8 is rotated in the opposite direction, so that the limiting screw 8 is threadedly connected to the threaded groove 6. At this time, the usage position of this device can be adjusted.

[0031] In summary, before using this device to test the water pressure of the water pump connection, when the device needs to be adjusted, the device's position can be changed, thus avoiding the difficulty of adjusting the position and making it easy to adjust.

[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A water pump adapter pressure detection device comprising a first connection terminal (22), characterized by: A height detection component for detecting the water pressure of the water pump connector and for convenient adjustment of the usage height is fixedly installed on the bottom of the first connecting terminal (22) and the outer side of the first connecting terminal (22). A support component for supporting the height detection component is fixedly installed on the bottom of the height detection component. A stabilizing component for increasing the stability of the height detection component is fixedly installed on one side of the support component and the outer surface of the height detection component. A positioning component for convenient adjustment of the usage position of the height detection component is slidably installed on the outer surface of the height detection component. A positioning component for positioning the positioning component is fixedly installed on one side of the height detection component and the bottom of the height detection component. A limiting component for limiting the positioning component is fixedly installed on one side of the height detection component and the outer surface of the height detection component.

2. A water pump coupling pressure detection device according to claim 1, characterized in that: The height detection assembly includes an electric telescopic rod (21) and a portal plate (2). The top of the electric telescopic rod (21) is fixedly installed at the bottom of the first connecting terminal (22). The inside of the portal plate (2) is fixedly installed on the outer side of the first connecting terminal (22). A loop handle (1) is fixedly connected to the top of the portal plate (2). The electric telescopic rod (21) is fixedly connected to the portal plate (2). A connecting plate (15) is fixedly connected to the telescopic end of the electric telescopic rod (21). A water tank body (14) is fixedly connected to the bottom of the connecting plate (15). The top of the water tank body (14) and the inside of the connecting plate (15) are connected together. A pressure gauge (17), a disc filter (18), a second connection terminal (20), and an inlet pipe (16) are fixedly connected. A sealing plug (19) is threaded onto the outer side of the top of the inlet pipe (16). A water pump body (26) is fixedly connected to the inner bottom wall of the water tank body (14). A rigid wire (25) is fixedly connected to the top of the water pump body (26). One end of the rigid wire (25) is fixedly installed inside the tank body (14) and inside the connecting plate (15). A rigid curved pipe (11) is fixedly connected to the water delivery end of the water pump body (26). The rigid curved pipe (11) is fixedly connected to the water tank body (14).

3. A water pump coupling pressure detection device according to claim 1 or 2, characterized in that: The support assembly includes a support plate (23), the top of which is fixedly installed at the bottom of the water tank body (14), the support plate (23) is slidably installed inside the gate-shaped support plate (2), and the front and rear sides of the support plate (23) are fixedly connected to a first loop-shaped long plate (12), which is slidably connected to the gate-shaped support plate (2).

4. A water pump coupling pressure detection device as set forth in claim 3 wherein: The stabilizing component includes a positioning plate (24) and a second loop-shaped plate (13). One side of the positioning plate (24) is fixedly installed on one side of the supporting horizontal plate (23). The interior of the second loop-shaped plate (13) is fixedly installed on the front and rear sides of the water tank body (14). The positioning plate (24) is slidably installed inside the plate of the portal support plate (2). The second loop-shaped plate (13) is slidably connected to the portal support plate (2).

5. A water pump coupling pressure detection device as set forth in claim 1, 2 or 4 wherein: The toilet assembly includes a door-shaped long plate (7), which is slidably installed on the bottom and one side of the door-shaped support plate (2). Multiple threaded grooves (6) are opened on one side of the door-shaped long plate (7), and a connecting long plate (5) is fixedly connected to the other side of the door-shaped long plate (7).

6. A water pump coupling pressure detection device as set forth in claim 3 wherein: The toilet assembly includes a door-shaped long plate (7), which is slidably installed on the bottom and one side of the door-shaped support plate (2). Multiple threaded grooves (6) are opened on one side of the door-shaped long plate (7), and a connecting long plate (5) is fixedly connected to the other side of the door-shaped long plate (7).

7. A water pump coupling pressure detection apparatus as set forth in any of claims 1, 2, 4 or 6, further comprising: The positioning components include a convex long rod (3) and a trapezoidal long rod (4). One side of the convex long rod (3) is fixedly installed on one side of the gate-shaped support plate (2), and the top of the trapezoidal long rod (4) is fixedly installed on the bottom of the gate-shaped support plate (2). Both the convex long rod (3) and the trapezoidal long rod (4) are slidably installed inside the plate body of the gate-shaped long plate (7).

8. A water pump coupling pressure detection device as set forth in claim 5 wherein: The positioning components include a convex long rod (3) and a trapezoidal long rod (4). One side of the convex long rod (3) is fixedly installed on one side of the gate-shaped support plate (2), and the top of the trapezoidal long rod (4) is fixedly installed on the bottom of the gate-shaped support plate (2). Both the convex long rod (3) and the trapezoidal long rod (4) are slidably installed inside the plate body of the gate-shaped long plate (7).

9. A water pump coupling pressure detection apparatus as set forth in any one of claims 1, 2, 4, 6 or 8, further comprising: The limiting assembly includes a first L-shaped plate (9) and a second L-shaped plate (10). One side of the first L-shaped plate (9) is fixedly installed on one side of the gate-shaped support plate (2). The interior of the second L-shaped plate (10) is fixedly installed on one side and the other side of the gate-shaped support plate (2). Both the first L-shaped plate (9) and the second L-shaped plate (10) are slidably connected to the gate-shaped long plate (7). The interior of the first L-shaped plate (9) is threaded with a limiting screw (8).

10. A water pump coupling pressure detection device as set forth in claim 7 wherein: The limiting assembly includes a first L-shaped plate (9) and a second L-shaped plate (10). One side of the first L-shaped plate (9) is fixedly installed on one side of the gate-shaped support plate (2). The interior of the second L-shaped plate (10) is fixedly installed on one side and the other side of the gate-shaped support plate (2). Both the first L-shaped plate (9) and the second L-shaped plate (10) are slidably connected to the gate-shaped long plate (7). The interior of the first L-shaped plate (9) is threaded with a limiting screw (8).

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