Combined double-control constant-temperature faucet

Abstract

A combined double-control constant-temperature faucet comprises a rear faucet body and a constant-temperature valve element mounting hole formed in the upper surface of the left end of the rear faucet body, a hot water connector and a cold water connector which are communicated with the constant-temperature valve element mounting hole are arranged on the rear faucet body, and a quick-opening valve mounting hole is formed in the upper surface of the right end of the rear faucet body. The hot water connector and the cold water connector are both arranged on the side wall of the rear side of the rear faucet body. The cold water joint is communicated with the middle part of the thermostatic valve core mounting hole through a cold water runner; the hot water joint is communicated with the middle part of the thermostatic valve core mounting hole through a hot water flow channel; and the lower end of the thermostatic valve core mounting hole is communicated with the quick-opening valve mounting hole through a mixed water flow channel. According to the combined type double-control constant-temperature faucet, the machining difficulty of the constant-temperature faucet body can be simplified, distribution of a plurality of flow channels is facilitated, meanwhile, the strength of the constant-temperature faucet body can be guaranteed, and the replacement cost can be effectively reduced.

Description

Technical Field

[0001] The utility model relates to the field of faucets, in particular to a combined double-control constant temperature faucet. Background Art

[0002] A thermostatic faucet is a water control device that uses a thermostatic valve core to adjust the temperature. The thermostatic faucet body has a cold water connector and a hot water connector. The cold water connector can input the cold water in the cold water pipe into the thermostatic valve core, and the hot water connector can input the hot water in the hot water pipe into the thermostatic valve core. The hot water and cold water are mixed in the thermostatic valve core to form mixed water with the actual required temperature, and then transported to the water outlet connector through the flow channel. The thermostatic faucet generally has multiple water outlet connectors, each of which can be opened and closed separately, while the traditional thermostatic faucet has a cold water connector, a hot water connector and multiple water outlet connectors. The water joints are all integrally formed on the thermostatic faucet body, which requires multiple corresponding flow channels to be set up in the thermostatic faucet body. A large number of flow channels are not only difficult to distribute and difficult to process, but also a large number of flow channels are concentrated in one thermostatic faucet body, which will cause the actual wall thickness of the thermostatic faucet body to become thinner, affecting the strength of the thermostatic faucet body. The complicated structure will increase the possibility of damage to the thermostatic faucet body to a certain extent. Once the thermostatic faucet body is partially damaged, due to its one-piece structure, the entire thermostatic faucet body can only be replaced, which seriously increases the replacement cost. Summary of the Invention

[0003] The utility model aims to solve the existing technical problem by providing a combined dual-control thermostatic faucet, which can not only simplify the processing difficulty of the thermostatic faucet body and facilitate the distribution of multiple flow channels, but also ensure the strength of the thermostatic faucet body and effectively reduce replacement costs.

[0004] The technical solution adopted by the utility model to solve the above technical problems is:

[0005] The utility model discloses a combined dual-control thermostatic faucet, comprising a rear faucet body, a thermostatic valve core mounting hole provided on the upper surface of the left end of the rear faucet body, a hot water joint and a cold water joint which are connected with the thermostatic valve core mounting hole on the rear faucet body, and a quick-opening valve mounting hole is provided on the upper surface of the right end of the rear faucet body; the hot water joint and the cold water joint are both provided on the rear side wall of the rear faucet body; the cold water joint is connected with the middle part of the thermostatic valve core mounting hole through a cold water flow channel; the hot water joint is connected with the middle part of the thermostatic valve core mounting hole through a hot water flow channel; the lower end of the thermostatic valve core mounting hole is connected A mixed water flow channel is connected with the quick-opening valve mounting hole; a rear connecting joint is provided on the front side wall of the right end of the rear faucet body and is connected with the quick-opening valve mounting hole; a front faucet body is provided on the front side of the rear faucet body; a front connecting joint matching the rear connecting joint is provided on the rear side wall of the right end of the front faucet body; a water delivery structure matching the front connecting joint is provided inside the front faucet body; a plurality of button valve core mounting holes matching the water delivery structure are provided on the upper surface of the front faucet body; a plurality of water outlet joints corresponding to the positions of the button valve core mounting holes are provided on the front side wall of the front faucet body.

[0006] The water supply structure includes a water collection channel provided in the front faucet body, and several button valve core mounting holes are connected through the water collection channel; the right end of the water collection channel is connected with the front connecting joint; the lower part of the front faucet body is provided with several water diversion channels corresponding to the positions of the water outlet joints, and the water outlet joint is connected with the lower end of the button valve core mounting hole through the water diversion channel.

[0007] The hot water joint is located on the left side of the cold water joint; a cold water hole communicating with the cold water channel is provided on the upper surface of the rear faucet body; a hot water hole communicating with the hot water channel is provided on the upper surface of the rear faucet body.

[0008] A connecting pipe is provided between the rear end of the front connecting joint and the front end of the rear connecting joint; the front and rear ends of the connecting pipe are provided with quick-release structures matching the rear end of the front connecting joint and the rear connecting joint.

[0009] The quick-release structure includes a screw joint that is screwed into the rear end port of the front connecting joint and the front end port of the rear connecting joint; one end of the screw joint is provided with a limiting portion that fits into the end face of the connecting pipe; the end of the connecting pipe is screwed onto a movable nut that matches it; the movable nut extends inward from the edge of one end port of the connecting pipe to form a clamping portion outside the screw joint, and the clamping portion is annular; the limiting portion is located between the clamping portion and the end face of the connecting pipe.

[0010] The end surface of the connecting pipe is provided with an annular sealing groove; a matching sealing ring is provided in the sealing groove.

[0011] The rear end face of the front connecting joint and the front end face of the rear connecting joint are both provided with an auxiliary washer that fits therewith; the auxiliary washer is sleeved on the outside of the screw joint, and the auxiliary washer is made of rubber; an annular pressure plate is provided between the auxiliary washer and the clamping part, and the pressure plate is sleeved on the outside of the screw joint; a pressure spring is provided between the pressure plate and the clamping part and is sleeved on the outside of the screw joint; the side wall of the auxiliary washer opposite to the pressure plate is provided with an annular groove; the inner wall of the groove is provided with an inner conical surface that is narrow on the left and wide on the right; the side wall of the pressure plate opposite to the auxiliary washer is provided with an extrusion part that matches the groove; the inner wall of the extrusion part is provided with an extrusion conical surface for fitting with the inner conical surface; there is an extrusion distance between the extrusion part and the bottom of the groove, and between the pressure plate and the auxiliary washer.

[0012] The beneficial effects of the utility model are:

[0013] Compared with the existing technology, the combined dual-control thermostatic faucet adopting the structure of the present invention divides the thermostatic faucet body into a front faucet body and a rear faucet body. A mixing water flow channel that is connected to the thermostatic valve core mounting hole is provided on the rear faucet body, and a plurality of water diversion flow channels that are connected to the water outlet joint are provided on the front faucet body, so that multiple flow channels are dispersed to the front faucet body and the rear faucet body. As the number of flow channels required to be set on a single faucet body is reduced, the processing difficulty can be effectively reduced, and the situation where the wall thickness of a single faucet body becomes thinner due to too many flow channels in the body can be effectively avoided, thereby effectively ensuring the strength of the front faucet body and the rear faucet body. At the same time, if the front faucet body or the rear faucet body is damaged, there is no need to replace the entire thermostatic faucet. Only the damaged front faucet body or the rear faucet body needs to be replaced, which effectively reduces the replacement cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a structural diagram of the utility model combined dual-control thermostatic faucet;

[0015] Figure 2 This is a cross-sectional view of the rear faucet body;

[0016] Figure 3 This is a top view of the rear faucet body;

[0017] Figure 4 yes Figure 3 AA cross-section of

[0018] Figure 5 yes Figure 3 BB cross-section diagram;

[0019] Figure 6 It is a three-dimensional picture of the main body of the rear faucet;

[0020] Figure 7 This is a cross-section of the main body of the front faucet;

[0021] Figure 8 This is a top view of the front faucet body;

[0022] Figure 9 yes Figure 8 CC cross-section diagram;

[0023] Figure 10 It is a cross-sectional view when the front connecting joint and the rear connecting joint are connected via a connecting pipe;

[0024] Figure 11 yes Figure 10 An enlarged view of part D. DETAILED DESCRIPTION

[0025] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0026] See also Figures 1 to 11 The utility model provides a combined dual-control thermostatic faucet, comprising a rear faucet body 1, a thermostatic valve core mounting hole 2 provided on the upper surface of the left end of the rear faucet body 1, a hot water connector 3 and a cold water connector 4 which are connected to the thermostatic valve core mounting hole 2 on the rear faucet body 1, and a quick-opening valve mounting hole 5 is provided on the upper surface of the right end of the rear faucet body 1; the hot water connector 3 and the cold water connector 4 are both provided on the rear side wall of the rear faucet body 1; the cold water connector 4 is connected to the middle of the thermostatic valve core mounting hole 2 through a cold water flow channel 6; the hot water connector 3 is connected to the middle of the thermostatic valve core mounting hole 2 through a hot water flow channel 7; the lower end of the thermostatic valve core mounting hole 2 is connected to a mixing valve The water flow channel 8 is connected with the quick-opening valve mounting hole 5; the front side wall of the right end of the rear faucet body 1 is provided with a rear connecting joint 9 that is connected with the quick-opening valve mounting hole 5; a front faucet body 10 is provided on the front side of the rear faucet body 1; the rear side wall of the right end of the front faucet body 10 is provided with a front connecting joint 11 that matches the rear connecting joint 9; a water supply structure that matches the front connecting joint 11 is provided inside the front faucet body 10; a plurality of button valve core mounting holes 12 that match the water supply structure are provided on the upper surface of the front faucet body 10; a plurality of water outlet joints 13 corresponding to the positions of the button valve core mounting holes 12 are provided on the front side wall of the front faucet body 10.

[0027] The water supply structure includes a water collection channel 14 provided in the front faucet body 10, and several button valve core mounting holes 12 are connected through the water collection channel 14; the right end of the water collection channel 14 is connected with the front connecting joint 11; the lower part of the front faucet body 10 is provided with several water diversion channels 15 corresponding to the position of the water outlet joint 13, and the water outlet joint 13 is connected with the lower end of the button valve core mounting hole 12 through the water diversion channel 15.

[0028] The hot water connector 3 is located on the left side of the cold water connector 4; the upper surface of the rear faucet body 1 is provided with a cold water hole 16 that is connected to the cold water flow channel 6; the upper surface of the rear faucet body 1 is provided with a hot water hole 17 that is connected to the hot water flow channel 7.

[0029] A connecting pipe 18 is provided between the rear end of the front connecting joint 11 and the front end of the rear connecting joint 9 ; the front and rear ends of the connecting pipe 18 are provided with quick-release structures matching the rear end of the front connecting joint 11 and the rear connecting joint 9 .

[0030] The quick-release structure includes a screw joint 19 that is screwed into the rear end port of the front connecting joint 11 and the front end port of the rear connecting joint 9; one end of the screw joint 19 is provided with a limiting portion 20 that fits with the end face of the connecting pipe 18; the end of the connecting pipe 18 is screwed onto the outside with a movable nut 21 that matches it; the movable nut 21 extends inward from the edge of one end port of the connecting pipe 18 to form a clamping portion 22 that is set outside the screw joint 19, and the clamping portion 22 is annular; the limiting portion 20 is located between the clamping portion 22 and the end face of the connecting pipe 18.

[0031] An annular sealing groove 23 is provided on the end surface of the connecting pipe 18 ; a matching sealing ring 24 is provided in the sealing groove 23 .

[0032] The rear end face of the front connecting joint 11 and the front end face of the rear connecting joint 9 are both provided with an auxiliary washer 25 that fits therewith; the auxiliary washer 25 is sleeved on the outside of the screw joint 19, and the auxiliary washer 25 is made of rubber; an annular pressure plate 26 is provided between the auxiliary washer 25 and the pressing portion 22, and the pressure plate 26 is sleeved on the outside of the screw joint 19; a pressure spring 27 is provided between the pressure plate 26 and the pressing portion 22 and is sleeved on the outside of the screw joint 19; the side wall of the auxiliary washer 25 opposite to the pressure plate 26 is provided with an annular groove 28; the inner groove wall of the groove 28 is provided with an inner conical surface 29 that is narrow on the left and wide on the right; the side wall of the pressure plate 26 opposite to the auxiliary washer 25 is provided with an extrusion portion 30 that matches the groove 28; the inner wall of the extrusion portion 30 is provided with an extrusion conical surface 31 for fitting with the inner conical surface 29; there is an extrusion spacing 32 between the extrusion portion 30 and the bottom of the groove 28, and between the pressure plate 26 and the auxiliary washer 25.

[0033] The method of using the utility model is as follows:

[0034] A thermostatic valve core that matches it can be installed in the thermostatic valve core mounting hole 2, a quick-opening valve that matches it can be installed in the quick-opening valve mounting hole 5, and a key valve core that matches it can be installed in the key valve core mounting hole 12. The thermostatic valve core, quick-opening valve and key valve core are all existing devices.

[0035] Before using the thermostatic faucet, you can first screw plugs into the cold water hole 16 and the hot water hole 17 to block the cold water hole 16 and the hot water hole 17 with the plugs. At this time, the cold water in the cold water pipe connected to the cold water connector 4 will flow into the thermostatic valve core in the thermostatic valve core mounting hole 2 through the cold water connector 4 and the cold water flow channel 6 in sequence, and the hot water in the hot water pipe connected to the hot water connector 3 will flow into the thermostatic valve core in the thermostatic valve core mounting hole 2 through the hot water connector 3 and the hot water flow channel 7 in sequence. At this moment, the cold water and the hot water are mixed in the thermostatic valve core to form mixed water with the actual required temperature. As the thermostatic valve core opens, the mixed water will enter the mixed water flow channel 8 through the lower end of the thermostatic valve core, and then flow to the quick-opening valve mounting hole 5 through the mixed water flow channel 8.

[0036] When the quick-opening valve in the quick-opening valve mounting hole 5 is opened, the mixed water flow channel 8 is connected with the rear connecting joint 9 through the quick-opening valve. At this time, the mixed water in the mixed water flow channel will flow through the rear connecting joint 9 to the front connecting joint 11, and then flow into the water confluence flow channel 14. At this moment, the key valve core installed in the key valve core mounting hole 12 closes the port connecting the lower end of the key valve core mounting hole 12 with the water diversion flow channel 15. When it is necessary to make one of the water outlet joints 13 discharge water, the key valve core in the key valve core mounting hole 12 corresponding to the water outlet joint 13 can be pressed to make the key valve core in the open state. At this moment, the water in the water confluence flow channel 14 The mixed water can flow into the water diversion channel 15 through the opened button valve core and flow out from the water outlet joint 13 for use. It can be seen that the utility model has two controls. When the button valve cores in all the button valve core mounting holes 12 are opened, the quick-opening valve in the quick-opening valve mounting hole 5 can simultaneously realize the opening and closing of all the water outlet joints. When the quick-opening valve in the quick-opening valve mounting hole 5 is always open, the button valve core in each button valve core mounting hole 12 can independently open or close its corresponding water outlet joint 13, so that different water outlet joints 13 are in different water outlet states, thereby adapting to different water delivery conditions.

[0037] From the above, it can be seen that the present invention divides the thermostatic faucet body into a front faucet body 10 and a rear faucet body 1, and a mixed water flow channel 8 that is connected to the thermostatic valve core mounting hole 2 is provided on the rear faucet body 1, and a plurality of water diversion flow channels 15 that are connected to the water outlet joint 13 are provided on the front faucet body 10, so that multiple flow channels are dispersed to the front faucet body 10 and the rear faucet body 1. As the number of flow channels required to be set on a single faucet body 0 is reduced, the processing difficulty can be effectively reduced, and the situation that the wall thickness of a single faucet body becomes thinner due to too many flow channels in the body can be effectively avoided, thereby effectively ensuring the strength of the front faucet body 10 and the rear faucet body 1. At the same time, if the front faucet body 10 or the rear faucet body 1 is damaged, there is no need to replace the entire thermostatic faucet, but only the damaged front faucet body 10 or the rear faucet body 1 needs to be replaced, which effectively reduces the replacement cost.

[0038] The hot water connector 3 is located on the left side of the cold water connector 4. A cold water hole 16 communicating with the cold water flow channel 6 is provided on the upper surface of the rear faucet body 1. A hot water hole 17 communicating with the hot water flow channel 7 is provided on the upper surface of the rear faucet body 1. The existence of the cold water hole 16 facilitates the processing of the cold water flow channel 6, and the existence of the hot water hole 17 facilitates the processing of the hot water flow channel 7.

[0039] A connecting pipe 18 is provided between the rear end of the front connecting joint 11 and the front end of the rear connecting joint 9 ; the front and rear ends of the connecting pipe 18 are provided with quick-release structures matching the rear end of the front connecting joint 11 and the rear connecting joint 9 .

[0040] The quick-release structure includes a screw joint 19 that is screwed into the rear end port of the front connecting joint 11 and the front end port of the rear connecting joint 9; one end of the screw joint 19 is provided with a limiting portion 20 that fits with the end face of the connecting pipe 18; the end of the connecting pipe 18 is screwed onto the outside with a movable nut 21 that matches it; the movable nut 21 extends inward from the edge of one end port of the connecting pipe 18 to form a clamping portion 22 that is set outside the screw joint 19, and the clamping portion 22 is annular; the limiting portion 20 is located between the clamping portion 22 and the end face of the connecting pipe 18.

[0041] Since the front and rear ends of the connecting pipe 18 are provided with quick-release structures that match the rear end of the front connecting joint 11 and the rear connecting joint 9, when it is necessary to separate the front faucet body 10 and the rear faucet body 1, there is no need to move the front faucet body 10 and the rear faucet body 1, and the separation between the front faucet body 10 and the rear faucet body 1 can be quickly completed, which is convenient for the maintenance and replacement of the front faucet body 10 and the rear faucet body 1. When it is necessary to separate the front faucet body 10 from the rear faucet body 1, it is only necessary to rotate the movable nut 21 to move the movable nut 21 in the direction away from the connecting pipe 18. When the movable nut 21 is no longer screwed on the end of the connecting pipe 18, the front faucet body 10 and the rear faucet body 1 are separated, and the entire separation process is extremely simple.

[0042] An annular sealing groove 23 is provided on the end face of the connecting pipe 18, and a matching sealing ring 24 is provided in the sealing groove 23. The presence of the sealing ring 24 can effectively improve the sealing performance when the screw joint 19 and the connecting pipe 18 are fixed by the movable nut 21, effectively avoiding water leakage.

[0043] The rear end face of the front connecting joint 11 and the front end face of the rear connecting joint 9 are both provided with an auxiliary washer 25 that fits therewith. The auxiliary washer 25 is sleeved on the outside of the screw joint 19. The auxiliary washer 25 is made of rubber. An annular pressure plate 26 is provided between the auxiliary washer 25 and the pressing portion 22. The pressure plate 26 is sleeved on the outside of the screw joint 19. A pressure spring 27 is provided between the pressure plate 26 and the pressing portion 22 and is sleeved on the outside of the screw joint 19. The side wall of the auxiliary washer 25 opposite to the pressure plate 26 is provided with an annular groove 28. The inner groove wall of the groove 28 is provided with an inner conical surface 29 that is narrow on the left and wide on the right. The side wall of the pressure plate 26 opposite to the auxiliary washer 25 is provided with an extrusion portion 30 that matches the groove 28. The inner wall of the extrusion portion 30 is provided with an extrusion conical surface 31 for fitting with the inner conical surface 29. There is an extrusion spacing 32 between the extrusion portion 30 and the bottom of the groove 28, and between the pressure plate 26 and the auxiliary washer 25. The pressure spring 27 The elasticity can make the extrusion portion 30 on the auxiliary gasket 25 be squeezed toward the auxiliary gasket 25, so that the extrusion cone surface 31 is squeezed toward the bottom of the groove 28 along the trajectory of the inner cone surface 29. At this time, the extrusion spacing 32 between the extrusion portion 30 and the bottom of the groove 28, and between the pressure plate 26 and the auxiliary gasket 25 is reduced, and the extrusion cone surface 31 will squeeze the inner cone surface 29 toward the center of the auxiliary gasket 25, so that the inner wall of the auxiliary gasket 25 is further squeezed against the outer wall of the screw joint 19. At the same time, the elasticity of the pressure spring 27 makes the auxiliary gasket 25 further fit against the rear end face of the front connecting joint 11 and the front end face of the rear connecting joint 9, thereby ensuring the sealing effect of the auxiliary gasket 25 to the greatest extent, effectively preventing water from leaking outward through the gap between the outer wall of the front side screw joint 19 and the inner wall of the front connecting joint 11, and the gap between the outer wall of the rear side screw joint 19 and the inner wall of the rear connecting joint 9, thereby achieving a water leakage prevention effect.

Claims

1. A combined dual-control thermostatic faucet, comprising a rear faucet body, a thermostatic valve core mounting hole provided on the upper surface of the left end of the rear faucet body, and a hot water connector and a cold water connector on the rear faucet body that are connected to the thermostatic valve core mounting hole, characterized in that: A quick-opening valve mounting hole is provided on the upper surface of the right end of the rear faucet body; the hot water joint and the cold water joint are both provided on the rear side wall of the rear faucet body; the cold water joint is connected with the middle part of the thermostatic valve core mounting hole through the cold water flow channel; the hot water joint is connected with the middle part of the thermostatic valve core mounting hole through the hot water flow channel; the lower end of the thermostatic valve core mounting hole is connected with the quick-opening valve mounting hole through a mixing water flow channel; a rear connecting joint is provided on the front side wall of the right end of the rear faucet body and is connected with the quick-opening valve mounting hole; a front faucet body is provided on the front side of the rear faucet body; a front connecting joint matching the rear connecting joint is provided on the rear side wall of the right end of the front faucet body; a water delivery structure matching the front connecting joint is provided in the front faucet body; a plurality of button valve core mounting holes matching the water delivery structure are provided on the upper surface of the front faucet body; a plurality of water outlet joints corresponding to the positions of the button valve core mounting holes are provided on the front side wall of the front faucet body.

2. The combined dual-control thermostatic faucet according to claim 1, characterized in that: The water delivery structure includes a water collection channel arranged in the front faucet body, and a plurality of button valve core mounting holes are connected through the water collection channel; the right end of the water collection channel is connected with the front connecting joint; a plurality of water diversion channels corresponding to the positions of the water outlet joints are arranged at the lower part of the front faucet body, and the water outlet joint is connected with the lower end of the button valve core mounting hole through the water diversion channel.

3. The combined dual-control thermostatic faucet according to claim 1, characterized in that: The hot water joint is located on the left side of the cold water joint; a cold water hole communicating with the cold water channel is provided on the upper surface of the rear faucet body; a hot water hole communicating with the hot water channel is provided on the upper surface of the rear faucet body.

4. The combined dual-control thermostatic faucet according to claim 1, characterized in that: A connecting pipe is arranged between the rear end of the front connecting joint and the front end of the rear connecting joint; the front and rear ends of the connecting pipe are provided with quick-release structures matching the rear end of the front connecting joint and the rear connecting joint.

5. The combined dual-control thermostatic faucet according to claim 4, characterized in that: The quick-release structure includes a screw joint that is screwed into the rear end port of the front connecting joint and the front end port of the rear connecting joint; one end of the screw joint is provided with a limiting portion that fits the end face of the connecting pipe; the end of the connecting pipe is screwed with a matching movable nut; the movable nut extends inward from the edge of one end of the connecting pipe to form a clamping portion outside the screw joint, and the clamping portion is annular; the limiting portion is located between the clamping portion and the end face of the connecting pipe.

6. The combined dual-control thermostatic faucet according to claim 5, characterized in that: The end surface of the connecting pipe is provided with an annular sealing groove; a sealing ring matching with the sealing groove is provided in the sealing groove.

7. The combined dual-control thermostatic faucet according to claim 5, characterized in that: The rear end face of the front connecting joint and the front end face of the rear connecting joint are both provided with an auxiliary gasket that fits therewith; the auxiliary gasket is sleeved on the outside of the screw joint, and the auxiliary gasket is made of rubber; an annular pressure plate is provided between the auxiliary gasket and the clamping part, and the pressure plate is sleeved on the outside of the screw joint; a pressure spring that is sleeved on the outside of the screw joint is provided between the pressure plate and the clamping part; an annular groove is provided on the side wall of the auxiliary gasket opposite to the pressure plate; an inner conical surface that is narrow on the left and wide on the right is provided on the inner side wall of the groove; an extrusion part matching the groove is provided on the side wall of the pressure plate; an extrusion conical surface for fitting with the inner conical surface is provided on the inner wall of the extrusion part; an extrusion spacing is provided between the extrusion part and the bottom of the groove, and between the pressure plate and the auxiliary gasket.

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