CN113236836B

CN113236836B - Angle valve

Info

Publication number: CN113236836B
Application number: CN202110585368.9A
Authority: CN
Inventors: 尹龙告; 孙孟杰; 张兴智
Original assignee: Quanzhou Rimei Sanitary Ware Co ltd
Current assignee: Quanzhou Rimei Sanitary Ware Co ltd
Priority date: 2021-05-27
Filing date: 2021-05-27
Publication date: 2023-01-24
Anticipated expiration: 2041-05-27
Also published as: CN113236836A

Abstract

The invention discloses an angle valve, which comprises a shell, belongs to the field of pipelines, and further comprises a sleeve, wherein the sleeve is accommodated in the shell, a through hole for water inlet is formed in the sleeve, a first flow passage and a second flow passage are further formed in the sleeve, the first flow passage is communicated with the second flow passage, the second flow passage is communicated with the through hole, and a valve assembly is arranged between the first flow passage and the second flow passage. The invention has the beneficial effects that: the sleeve is provided with a first flow passage and a second flow passage, and the communication and the closing of the first flow passage and the second flow passage are controlled by the arranged valve assembly.

Description

Angle valve

Technical Field

The invention relates to the field of pipelines, in particular to an angle valve.

Background

The angle valve is the instrument that is used for the pipeline field, there is a large amount of angle valves that are used for stagnant water or throttle in the market, because the angle valve need apply great power in the installation, cause the damage of angle valve material tissue easily, the subsequent continuous use of angle valve causes the angle valve ageing in addition, the case burst open appears seriously, the condition that the fracture drops even, easily leak water in a large number under the condition that the consumer is unknown, flood wet house, harm consumer's property personal safety, consequently, there is the angle valve of leak protection water on the market, even the angle valve takes place the fracture and also can in time block up the runner in the condition that the consumer is unknown, reduce loss of property. However, once the flow channel is blocked, the angle valve in the market at present cannot be used, cannot meet the requirement of temporary water consumption of consumers, and brings inconvenience to the consumers.

For example, the patent of invention with the publication number of CN110017399B discloses a leak-proof water angle valve, which comprises a valve casing arranged at a right angle, a sleeve accommodated in the valve casing, a piston rod and a valve core, wherein the valve casing is detachably connected with the outside, the sleeve is arranged at the water inlet end of the valve casing and is provided with a step through hole, the piston rod is sleeved in the step through hole and telescopically moves relative to the sleeve, a first water flow channel is formed by a gap between the sleeve and the piston rod, the piston rod is provided with a plug and a connecting part along the water inlet direction, the radial size of the plug is smaller than the size of an outer hole of the step through hole and larger than the size of an inner hole of the step through hole, the connecting part is used for abutting against the valve core, the valve core comprises a casing and a water diversion part, the connecting part is used for abutting against the water diversion part, a water outlet is arranged on the casing, a second water flow channel is formed by a gap between the water diversion part and the casing, and a valve cap is arranged at a right angle with the water outlet and is arranged in parallel relative to the second water flow channel. The angle valve that this patent relates to can play the effect of timely stagnant water after the fracture, but can not satisfy the demand of consumer's interim water.

Disclosure of Invention

For overcoming the leak protection water angle valve that exists among the prior art, though can be under the condition that the consumer is unknown, in time block up the runner when the angle valve breaks off, reduce loss of property, nevertheless, often have in case block up the runner and just can't use, can't satisfy the demand of the interim water of consumer, bring inconvenient problem for the consumer. The invention provides an angle valve, which enables a consumer to play a role in temporary water supply after water is stopped on the angle valve through the arrangement of a first flow passage, a second flow passage and a valve assembly, and meets the requirement of the consumer on temporary water use. The specific technical scheme is as follows:

an angle valve comprises a shell and a sleeve, wherein the sleeve is accommodated in the shell, a through hole for water inflow is formed in the sleeve, a first flow passage and a second flow passage are further formed in the sleeve, the first flow passage is communicated with the second flow passage, the second flow passage is communicated with the through hole, and a valve assembly is arranged between the first flow passage and the second flow passage.

The sleeve is provided with a first flow passage and a second flow passage, the first flow passage and the second flow passage are controlled to be communicated and closed through the arranged valve assembly, the angle valve is not broken in daily use, the first flow passage and the second flow passage are not communicated under the blocking of the valve assembly, and after the angle valve is broken, the valve assembly can be opened to communicate the first flow passage and the second flow passage to play a role in temporary water supply.

Preferably, the valve assembly comprises a valve plate, the valve plate comprises a vertical plate, and a blocking part for blocking the second flow passage is arranged at one end, close to the second flow passage, of the vertical plate; still open the slip chamber on the sleeve, riser slidable mounting is inside the slip chamber, the slip chamber is followed the length that stifled portion blockked up the direction setting is greater than the riser is followed the length that stifled portion blockked up the direction setting.

Preferably, the valve plate still includes the diaphragm, the valve plate is the cross, first sliding tray has still been opened on the sleeve, first sliding tray sets up and is close to at the sliding chamber casing one side, the sliding chamber with first sliding tray intercommunication, diaphragm slidable mounting be in inside the first sliding tray, the diaphragm can cover first sliding tray with sliding chamber intercommunication part, first sliding tray is followed the length that jam portion blockked up the direction and set up is greater than the diaphragm is followed the length that jam portion blockked up the direction and set up.

Preferably, a sealing assembly is arranged between the sliding cavity and the first sliding groove.

Preferably, a blocking end is formed at one end of the first flow passage communicated with the second flow passage, the cross section of the blocking end along the blocking direction of the blocking portion is in an a shape with an area from small to large, the shape of the blocking portion is the same as that of the blocking end, and the blocking portion is slidably accommodated in the blocking end.

Preferably, the a shape is a right-angled trapezoid.

The cross-section design is right trapezoid, slides gradually when withdrawing from the jam end when jam portion, and the water yield of entering increases gradually, consequently, withdraws from when the jam end when jam portion, and fixed position is different, and the water yield of entering is different, plays the effect of regulating the water yield size.

Preferably, a second sliding groove is formed in the shell, and one end, close to the shell, of the vertical plate penetrates through the second sliding groove and is connected with a sliding adjusting assembly.

Preferably, the sliding adjustment assembly comprises a sliding assembly and a fixing assembly, the sliding assembly comprises a first rotating cylinder, a first internal thread is arranged on the first rotating cylinder, the matching part of the shell and the sliding assembly is arranged to be a cylindrical shell, and a first external thread screwed with the first internal thread is arranged on the outer side of the shell.

Preferably, the fixing component comprises a fixing block and a second rotating cylinder, the fixing block is mounted at one end of the vertical plate, a second annular connecting portion is arranged on the fixing block, a first annular connecting portion is arranged on the second rotating cylinder, the first annular connecting portion is embedded on the second annular connecting portion, the first annular connecting portion can rotate around the second rotating cylinder in the axial direction relative to the second annular connecting portion, and axial movement does not occur between the first annular connecting portion and the second annular connecting portion; the first rotating cylinder is fixedly connected with the second rotating cylinder, and the first rotating cylinder and the second rotating cylinder are coaxially arranged.

Preferably, the valve further comprises a valve core and a piston rod, the through hole is a stepped through hole, the piston rod comprises a rod body and a rod head, the rod body penetrates through the stepped through hole, a gap is arranged between the rod body and the stepped through hole, the radial size of the rod head is smaller than the radial size of an outer hole of the stepped through hole and larger than the radial size of an inner hole of the stepped through hole, and one end of the rod body, which is far away from the rod head, abuts against one end of the valve core.

Has the advantages that:

the technical scheme of the invention has the following beneficial effects:

(1) The sleeve is provided with a first flow passage and a second flow passage, and the communication and the closure between the first flow passage and the second flow passage are controlled by the arranged valve assembly, when the angle valve is used in daily life, the angle valve is not broken, the first flow passage and the second flow passage are not communicated under the blocking of the valve assembly, and water flows out through the through hole for use; after the angle valve is broken to stop water, the valve assembly can be opened to communicate the first flow passage and the second flow passage, so that water flows through the first flow passage and the second flow passage and then enters the through hole to flow out, and the temporary water supply effect is achieved; the consumer can open the direct water receiving of valve assembly when using, and the hand can not contact the water source, and is cleaner, can also connect the water pipe again on the angle valve after the fracture, uses temporarily, also cleaner convenience.

(2) The cross-section design is right trapezoid, and when the jam portion slipped out the jam end gradually, the water yield of entering increased gradually, consequently, when the jam portion exited out the jam end, the fixed position was different, and the water yield of entering is different, played the effect of adjusting the water supply water yield size.

(3) Be provided with the slip adjustment subassembly, wherein threaded connection between first rotatory section of thick bamboo and the casing, when the consumer need supply water temporarily, will rotate first rotatory section of thick bamboo, first rotatory section of thick bamboo will drive rather than the rotatory section of thick bamboo rotation of reciprocal anchorage to it takes place the displacement to drive the rotatory section of thick bamboo of second, and then the rotatory section of thick bamboo of second will drive the fixed block, and the fixed block drives the riser, and the riser drives the jam portion and takes place the displacement, when the regulating pondage suitable back, stops the rotation promptly. The sliding adjusting component can realize the sliding of the blocking block and fix the blocking block at a required position.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and that those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.

FIG. 1 is a cross-sectional view of a preferred angle valve of the present invention in a normal use condition;

FIG. 2 is a cross-sectional view of the preferred angle valve of the present invention in a broken state;

FIG. 3 is a partial schematic view of a preferred angle valve of the present invention;

FIG. 4 is a partial schematic view of a preferred angle valve of the present invention.

In the figure: 1. a sleeve; 11. a vertical plate; 12. a transverse plate; 13. a blocking portion; 14. a blocked end;

15. a first flow passage; 16. a second flow passage; 17. a sliding cavity; 18. a second sliding groove;

19. a first sliding groove; 2. a valve core; 21. a club head; 22. a shaft body; 3. a housing;

31. a first rotary cylinder; 32. a second rotary cylinder; 33. a first external thread; 34. a fixed block;

4. and a through hole.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

As shown in fig. 1 to 4, an angle valve includes a housing 3, and further includes a sleeve 1, the sleeve 1 is accommodated in the housing 3, a through hole 4 for water inlet is formed in the sleeve 1, a first flow passage 15 and a second flow passage 16 are further formed in the sleeve 1, the first flow passage 15 is communicated with the second flow passage 16, the second flow passage 16 is communicated with the through hole 4, and a valve assembly is disposed between the first flow passage 15 and the second flow passage 16.

The sleeve is provided with a first flow passage and a second flow passage, and the communication and the closing of the first flow passage and the second flow passage are controlled by the arranged valve assembly.

In a preferred embodiment, the valve assembly comprises a valve plate, the valve plate comprises a vertical plate 11, and a blocking part 13 for blocking the second flow passage 16 is arranged at one end of the vertical plate 11 close to the second flow passage 16; the sleeve 1 is further provided with a sliding cavity 17, the vertical plate 11 is slidably mounted in the sliding cavity 17, and the length of the sliding cavity 17 in the blocking direction of the blocking portion 13 is larger than the length of the vertical plate 11 in the blocking direction of the blocking portion 13.

As a preferable embodiment, the valve plate further includes a transverse plate 12, the valve plate is cross-shaped, the sleeve 1 is further provided with a first sliding groove 19, the first sliding groove 19 is disposed on one side of the sliding cavity 17 close to the housing 3, the sliding cavity 17 is communicated with the first sliding groove 19, the transverse plate 12 is slidably mounted inside the first sliding groove 19, the transverse plate 12 can cover the communicating portion of the first sliding groove 19 and the sliding cavity 17, and the length of the first sliding groove 19 in the blocking direction of the blocking portion 13 is greater than the length of the transverse plate 12 in the blocking direction of the blocking portion 13.

In a preferred embodiment, a sealing assembly is provided between the sliding chamber 17 and the first sliding groove 19.

In a preferred embodiment, the sealing assembly includes a sealing rubber (not shown) covering the edge of the channel connecting the sliding cavity 17 and the first sliding groove 19.

In a preferred embodiment, a blocking end 14 is formed at one end of the first flow passage 15, which is communicated with the second flow passage 16, the cross section of the blocking end 14 along the blocking direction of the blocking part 13 is an a shape with a small area from large to small, the blocking part 13 and the blocking end 14 are the same in shape, and the blocking part 13 is slidably accommodated in the blocking end 14.

In a preferred embodiment, the shape a is a right-angled trapezoid.

The cross-section design is right trapezoid, slides gradually when withdrawing from the jam end when jam portion, and the water yield of entering increases gradually, consequently, withdraws from when jam portion blocks up the end, and fixed position is different, and the water yield of entering is different, plays the effect of adjusting the water supply water yield size.

In a preferred embodiment, the casing 3 is provided with a second sliding groove 18, and one end of the vertical plate 11 close to the casing 3 passes through the second sliding groove 18 and is connected with a sliding adjusting component.

As a preferred embodiment, the sliding adjustment assembly comprises a sliding assembly and a fixing assembly, the sliding assembly comprises a first rotating cylinder 31, a first internal thread (not shown) is arranged on the first rotating cylinder 31, the matching part of the housing 3 and the sliding assembly is provided as a cylindrical housing 3, and a first external thread 33 screwed with the first internal thread is arranged on the outer side of the housing 3.

As a preferred embodiment, the fixing component includes a fixed block 34 and a second rotating cylinder 32, the fixed block 34 is mounted at one end of the vertical plate 11, a second annular part (not shown) is provided on the fixed block 34, a first annular part (not shown) is provided on the second rotating cylinder 32, the first annular part is embedded on the second annular part, the first annular part can rotate around the second rotating cylinder 32 in the axial direction relative to the second annular part, and no axial movement occurs between the first annular part and the second annular part; the first rotating cylinder 31 is fixedly connected with the second rotating cylinder 32, and the first rotating cylinder 31 and the second rotating cylinder 32 are coaxially arranged.

As a preferred embodiment, the valve further comprises a valve core 2 and a piston rod, the through hole 4 is provided as a stepped through hole 4, the piston rod comprises a rod body 22 and a rod head 21, the rod body 22 passes through the stepped through hole, a gap is provided between the rod body 22 and the stepped through hole 4, the radial dimension of the rod head 21 is smaller than the radial dimension of an outer hole of the stepped through hole 4 and larger than the radial dimension of an inner hole of the stepped through hole 4, and one end of the rod body 22, which is far away from the rod head 21, abuts against one end of the valve core 2.

Example 1

As shown in fig. 1 to 4, an angle valve includes a housing 3, the housing 3 is cylindrical, and further includes a sleeve 1, the sleeve 1 and the housing 3 are coaxially disposed, the sleeve 1 is accommodated inside the housing 3, a through hole 4 for water inlet is formed in the sleeve 1, the sleeve 1 is further provided with a first flow channel 15 and a second flow channel 16, the first flow channel 15 is communicated with the second flow channel 16, the second flow channel 16 is communicated with the through hole 4, a valve assembly is disposed between the first flow channel 15 and the second flow channel 16, specifically, in this embodiment, the sleeve 1 is provided with two sets of the first flow channel 15 and the second flow channel 16. The valve component comprises a valve plate, the valve plate comprises a vertical plate 11, and a blocking part 13 for blocking the second flow passage 16 is arranged at one end, close to the second flow passage 16, of the vertical plate 11; the sleeve 1 is further provided with a sliding cavity 17, the vertical plate 11 is slidably mounted in the sliding cavity 17, and the length of the sliding cavity 17 in the blocking direction of the blocking part 13 is larger than the length of the vertical plate 11 in the blocking direction of the blocking part 13. The valve plate still includes diaphragm 12, the valve plate is the cross, still open first sliding tray 19 on the sleeve 1, first sliding tray 19 sets up and is close to casing 3 one side at sliding chamber 17, sliding chamber 17 and first sliding tray 19 intercommunication, diaphragm 12 slidable mounting is inside first sliding tray 19, diaphragm 12 can cover first sliding tray 19 and sliding chamber 17 intercommunication part, the length that first sliding tray 19 set up along the jam portion 13 jam direction is greater than the length that diaphragm 12 set up along the jam portion 13 jam direction of jam. A sealing assembly is arranged between the sliding cavity 17 and the first sliding groove 19 and comprises sealing rubber coated on the edge of a channel for communicating the sliding cavity 17 with the first sliding groove 19. Specifically, in the present embodiment, the blocking direction of the blocking portion 13 is the same as the axial direction of the sleeve 1, and the second flow passage 16, the first flow passage 15, the sliding cavity 17, and the first sliding groove 19 are sequentially arranged from the inside to the outside in the radial direction of the housing 3 toward the housing 3.

The end of the first flow passage 15 communicated with the second flow passage 16 is formed with a blocking end 14, the cross section of the blocking end 14 along the blocking direction of the blocking part 13 is in an A shape with an area from small to large, the blocking part 13 and the blocking end 14 are in the same shape, and the blocking part 13 is slidably accommodated in the blocking end 14. Specifically, in this embodiment, the shape a is a right-angled trapezoid.

The casing 3 is provided with a second sliding groove 18, the second sliding groove 18 is arranged on one side of the first sliding groove 19 close to the casing 3, and one end of the vertical plate 11 close to the casing 3 passes through the second sliding groove 18 and is connected with a sliding adjusting component. The sliding adjusting assembly comprises a sliding assembly and a fixing assembly, the sliding assembly comprises a first rotating cylinder 31, a first internal thread is arranged on the first rotating cylinder 31, the shell 3 and the matching part of the sliding assembly are arranged to be a cylindrical shell 3, and a first external thread 33 screwed with the first internal thread is arranged on the outer side of the shell 3. The fixing component comprises a fixing block 34 and a second rotating cylinder 32, the fixing block 34 is installed at one end, close to the shell 3, of the vertical plate 11, a second annular part is arranged on the fixing block 34, a first annular part is arranged on the second rotating cylinder 32 and is embedded on the second annular part, the first annular part can rotate around the second rotating cylinder 32 in the axial direction relative to the second annular part, and axial movement does not occur between the first annular part and the second annular part; the first rotating cylinder 31 is fixedly connected with the second rotating cylinder 32, and the first rotating cylinder 31 and the second rotating cylinder 32 are coaxially arranged. Specifically, in the present embodiment, the first rotary cylinder 31 and the second rotary cylinder 32 are integrally formed.

Still include case 2 and piston rod, through-hole 4 sets up to ladder through-hole 4, and the piston rod includes pole body 22 and pole head 21, and pole body 22 passes ladder through-hole 4, is provided with the clearance between pole body 22 and the ladder through-hole 4, and pole head 21 radial dimension is less than 4 outer hole radial dimension of ladder through-hole and is greater than 4 hole radial dimension of ladder through-hole, and pole body 22 keeps away from the pole head 21 one end butt in case 2 one end.

Specifically, in this embodiment, the blocking portion 13 slides in the direction of the stem head 21 along the length direction of the angle valve, the first flow passage 15 and the second flow passage 16 communicate with each other, whereas the first flow passage 15 and the second flow passage 16 are closed, and the first rotary cylinder 31 slides in the direction of the stem head 21 along the length direction of the angle valve and is gradually loosened and vice versa.

The working principle is as follows:

when the angle valve works normally, the bottom of the piston rod is abutted to one end of the valve core 2, the valve assembly closes the first flow passage 15 and the second flow passage 16, water flows through a gap between the piston rod and the sleeve 1, and the angle valve is used normally; when the angle valve is partially broken at the valve core 2, the piston rod loses the abutting of the valve core 2, so that the angle valve moves outwards under the action of water flow, and finally the through hole 4 of the sleeve 1 is blocked, water leakage cannot occur, when a consumer finds that the angle valve is broken and needs temporary water, the first rotary cylinder 31 can be unscrewed towards the rod head 21, the first rotary cylinder 31 is fixedly connected with the second rotary cylinder 32, the first rotary cylinder 31 moves towards the rod head 21 through the second rotary cylinder 32, the fixed block 34 is driven towards the rod head 21 through the second rotary cylinder 32, the blocking part 13 is further driven towards the rod head 21, the communication between the first flow channel 15 and the second flow channel 16 is realized, at the moment, the water flows out from the first flow channel 15 through the second flow channel 16 and then through a gap between the piston rod and the sleeve 1, and the consumer can realize different withdrawing distances of the blocking part 13 from the blocking end 14 through different fixed positions of the first rotary cylinder 31, and the adjustment of the size of the water flow is realized; at the moment, the consumer can directly receive water, and can also fix a water pipe additionally to temporarily take water.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An angle valve comprises a shell and is characterized by further comprising a sleeve, wherein the sleeve is accommodated in the shell, a through hole for water inlet is formed in the sleeve, a first flow passage and a second flow passage are further formed in the sleeve, the first flow passage is communicated with the second flow passage, the second flow passage is communicated with the through hole, and a valve assembly is arranged between the first flow passage and the second flow passage; the valve component comprises a valve plate, the valve plate comprises a vertical plate, and a blocking part for blocking the second flow passage is arranged at one end, close to the second flow passage, of the vertical plate; the sleeve is further provided with a sliding cavity, the vertical plate is slidably mounted in the sliding cavity, and the length of the sliding cavity in the blocking direction of the blocking part is greater than the length of the vertical plate in the blocking direction of the blocking part; a second sliding groove is formed in the shell, and one end, close to the shell, of the vertical plate penetrates through the second sliding groove and is connected with a sliding adjusting assembly; the sliding adjusting assembly comprises a sliding assembly and a fixing assembly, the sliding assembly comprises a first rotating cylinder, a first internal thread is arranged on the first rotating cylinder, the matching part of the shell and the sliding assembly is a cylindrical shell, and a first external thread in threaded connection with the first internal thread is arranged on the outer side of the shell; the fixed assembly comprises a fixed block and a second rotary drum, the fixed block is mounted at one end of the vertical plate, a second annular part is arranged on the fixed block, a first annular part is arranged on the second rotary drum, the first annular part is embedded on the second annular part, the first annular part can axially rotate around the second rotary drum relative to the second annular part, and axial movement does not occur between the first annular part and the second annular part; the first rotating cylinder is fixedly connected with the second rotating cylinder, and the first rotating cylinder and the second rotating cylinder are coaxially arranged.

2. The angle valve of claim 1, wherein the valve plate further comprises a transverse plate, the valve plate is cross-shaped, the sleeve is further provided with a first sliding groove, the first sliding groove is arranged on one side of the sliding cavity, which is close to the housing, the sliding cavity is communicated with the first sliding groove, the transverse plate is slidably mounted inside the first sliding groove, the transverse plate can cover the communication part of the first sliding groove and the sliding cavity, and the length of the first sliding groove in the blocking direction of the blocking portion is greater than the length of the transverse plate in the blocking direction of the blocking portion.

3. An angle valve according to claim 2, wherein a seal assembly is provided between the sliding chamber and the first sliding groove.

4. The angle valve as claimed in claim 2, wherein the end of the first flow passage communicating with the second flow passage is formed with a blocking end, the cross section of the blocking end along the blocking direction of the blocking portion is an a shape with a smaller area to a larger area, the blocking portion and the blocking end have the same shape, and the blocking portion is slidably accommodated in the blocking end.

5. An angle valve according to claim 4, wherein said A-shape is a right angle trapezoid.

6. The angle valve according to claim 1, further comprising a valve core and a piston rod, wherein the through hole is a stepped through hole, the piston rod comprises a rod body and a rod head, the rod body penetrates through the stepped through hole, a gap is formed between the rod body and the stepped through hole, the radial dimension of the rod head is smaller than the radial dimension of an outer hole of the stepped through hole and larger than the radial dimension of an inner hole of the stepped through hole, and one end of the rod body, which is far away from the rod head, abuts against one end of the valve core.