CN213271292U

CN213271292U - Temperature control head

Info

Publication number: CN213271292U
Application number: CN202022175104.XU
Authority: CN
Inventors: 宋良; 赵智康; 狄云佩; 葛兵
Original assignee: Zhejiang Valogin Technology Co ltd
Current assignee: Zhejiang Valogin Technology Co ltd
Priority date: 2020-09-28
Filing date: 2020-09-28
Publication date: 2021-05-25
Anticipated expiration: 2030-09-28

Abstract

The utility model provides a temperature control head belongs to valve technical field. It has solved the first adjustable valve gap of current temperature control and can not lock scheduling problem with the connecting seat. This temperature control head, including the connecting seat, the upper end threaded connection of connecting seat has the regulation valve gap, the internal fixation of regulation valve gap has the temperature package, the connecting seat interpolation is equipped with the valve rod, be provided with the spring between valve rod and the temperature package, convex sticking department has on the lateral surface of connecting seat, the sticking department is located the below of adjusting the valve gap, the locking hole that runs through from top to bottom has on the sticking department, set up the locking groove that corresponds the setting with the locking hole on the medial surface of regulation valve gap lower extreme, the lower extreme opening of locking groove, the locking groove has the several and arranges along circumference in proper order, the temperature control head still includes the locking inserted bar, the locking inserted bar can be inserted in the locking hole from the lower extreme of sticking department, and the upper end. The adjusting valve cover and the connecting seat in the temperature control head can be locked, so that the temperature set value can be locked.

Description

Temperature control head

Technical Field

The utility model belongs to the technical field of the valve, a temperature control head is related to.

Background

The valve is defined as: the machine product with movable mechanism is used for controlling medium in pipeline. The valves can be divided into gate valves, stop valves, throttle valves, ball valves, butterfly valves, check valves, regulating valves and the like according to the structure, the regulating valves are also called control valves, and the regulating valves are defined as follows: the valve is intended to be used in any position of closing and full opening, and the flow rate, pressure or temperature can be regulated by changing the cross-sectional area of the passage through the opening and closing member. The opening and closing member in the definition is also called a valve core, and the temperature control valve is one of regulating valves and is used for regulating the flow rate of hot water when the hot water passes through so as to control the temperature of mixed water in a pipeline. The temperature control head (thermostatic controller) is connected with the valve core and can drive the valve core to act.

Chinese patent literature document discloses a thermostatic controller [ application number: CN 201120219707.3; the notice number is: CN 202158251U ], including locating the connecting seat on the temperature-sensing valve body and locating the regulation valve gap above the connecting seat, the regulation valve gap passes through the screw thread to be connected with the connecting seat, is equipped with the temperature bulb in adjusting the valve gap, and the circumferencial has linked firmly the valve rod in the connecting seat, is equipped with the spring that makes the valve rod have the trend of shifting up between valve rod and the connecting seat, has still linked firmly the adapter sleeve in the circumference in the outside of connecting seat, and the upper end of adapter sleeve links firmly with the lower.

Under the action of spring force, the thermal bulb abuts against the inner side of the adjusting valve cover, the upper end of the valve rod is inserted into the thermal bulb, and the lower end of the valve rod is connected with a valve core of the temperature control valve. When the adjusting valve cover is rotated, the adjusting valve cover can move up and down, so that the valve rod is driven to move up and down, and the valve core of the temperature control valve is controlled to be opened or closed. The regulating valve cover is rotated to a set position, the flow passing through the control valve is limited within a certain range, and when the temperature is higher than the set temperature, the thermal bulb expands to enable the valve rod to move downwards and drive the valve core to enable the flow passing through the control valve to be reduced, so that the temperature is reduced. When the temperature is lower than the set temperature, the thermal bulb contracts to drive the valve rod to move upwards, so that the valve core is driven to increase the flow passing through the control valve, and the temperature is increased. However, a locking structure for locking the adjusting valve cover and the connecting seat in the circumferential direction is not arranged between the adjusting valve cover and the connecting seat, and after the adjusting valve cover rotates to set the temperature, the adjusting valve cover can also rotate relative to the connecting seat, so that the temperature design value caused by artificial misrotation is easy to change.

Disclosure of Invention

The utility model aims at the above-mentioned problem that prior art exists, provide a temperature control head, solved the technical problem that current temperature control head in adjusting valve gap and the connecting seat can not be locked.

The purpose of the utility model can be realized by the following technical proposal:

the utility model provides a temperature control head, includes the connecting seat, the upper end threaded connection of connecting seat has the regulation valve gap, regulation valve gap internal fixation has the temperature bulb, the connecting seat interpolation is equipped with the valve rod, be provided with the spring between valve rod and the temperature bulb, its characterized in that, convex sticking department has on the lateral surface of connecting seat, the sticking department is located the below of adjusting the valve gap, the locking hole that runs through from top to bottom has on the sticking department, set up the locking groove that corresponds the setting with the locking hole on the medial surface of regulation valve gap lower extreme, the lower extreme opening of locking groove, the locking groove has the several and arranges in proper order along circumference, and the temperature control head still includes the locking inserted bar, the locking inserted bar can be followed the lower extreme of sticking department and inserted in the locking hole, and the upper end of locking inserted bar can be gone.

During installation, the lower end of the connecting seat is fixedly connected to the valve body of the temperature control valve, and the lower end of the valve rod is connected with the valve core of the temperature control valve. During the use, rotate the regulation valve gap and adjust the settlement temperature, because the locking groove has the several and arrange along circumference in proper order, rotate the locking hole of regulation valve gap back sticking department and can be relative with one of them locking groove, then insert the locking downthehole from the lower extreme of sticking department with the locking inserted bar, and the upper end card of locking inserted bar is gone into and is fixed with the locking inslot that the locking hole is relative, adjusts the valve gap like this and forms the circumference locking with the connecting seat. Therefore, the adjusting valve cover and the connecting seat in the temperature control head can be locked.

In the temperature control head, the outer end of the locking part is provided with a pointer which protrudes upwards, the pointer is positioned on the outer side of the adjusting valve cover, the outer side surface of the lower end of the adjusting valve cover is provided with a plurality of set temperature scale marks which are sequentially arranged along the circumferential direction, the set temperature scale marks and the locking grooves are arranged in a one-to-one correspondence manner, and the locking grooves corresponding to the set temperature scale marks are opposite to the locking holes when the pointer and one of the set temperature scale marks are opposite.

One set temperature scale mark corresponds to one set temperature value. When the temperature-adjustable valve is used, the adjusting valve cover is rotated to enable the pointer to be opposite to a required set temperature scale mark, at the moment, the locking groove corresponding to the set temperature scale mark is opposite to the locking hole, the locking inserted rod is inserted into the locking hole from the lower end of the locking part, and the upper end of the locking inserted rod is clamped into the locking groove to be fixed. The locking hole and the locking groove are aligned by the set temperature scale mark and the pointer which are arranged on the outer side and convenient to observe, so that the locking operation between the adjusting valve cover and the connecting seat is smoothly carried out.

In the above temperature control head, a side face of the lower end of the lock plunger has a lug thereon, which can abut against a lower end face of the lock portion when the lock plunger is inserted into the lock hole. When the locking inserted bar is inserted into the locking hole, the lug has a positioning function, the locking inserted bar is prevented from not entering the locking groove due to the fact that the locking inserted bar is not inserted in place, and the locking stability between the adjusting valve cover and the connecting seat is guaranteed.

In foretell temperature control head, still have convex reinforcing part on the lateral surface of connecting seat, the sticking part is integrative to be fixed on the lower end of reinforcing part, the lateral surface of reinforcing part has the draw-in groove that communicates with the locking hole, the upper end opening of draw-in groove, the inside portion of locking inserted bar can block into in the draw-in groove.

The fixing effect of the locking inserted bar on the temperature control head is enhanced through the clamping groove, the possibility that the locking inserted bar falls out of the temperature control head is reduced, and the locking between the adjusting valve cover and the connecting seat is stable. The upper end opening of the clamping groove can enable the locking inserted bar to smoothly extend out of the clamping groove and be inserted into the locking groove, and locking between the adjusting valve cover and the connecting seat is guaranteed.

In the temperature control head, the inner side surface of the lower end of the adjusting valve cover is further fixed with a limiting block, and the limiting block can abut against the reinforcing part in the rotating process of the adjusting valve cover. The rotation range of the adjusting valve cover is limited by the limiting block, the adjusting valve cover is prevented from falling out of the connecting seat after rotating for multiple circles, and the temperature control head is stable to use.

In the temperature control head, the spring is sleeved outside the valve rod, the spring sleeve is sleeved outside the spring, the upper end of the spring sleeve abuts against the thermal bulb, a sealing plate is arranged at the upper end opening of the spring sleeve, the upper end of the spring abuts against the sealing plate, and the lower end of the spring abuts against the lower end of the valve rod. The spring and the thermal bulb are separated by the spring sleeve, so that the spring and the thermal bulb are stable in stretching and contracting, and the temperature control function of the temperature control head on the temperature control valve is stable.

In foretell temperature control head, the lower extreme of valve rod is fixed with the cover and establishes the location section of thick bamboo outside the valve rod, have along axially extended positioning groove on the lateral surface of a location section of thick bamboo, the location sand grip that has the embedding in the positioning groove on the medial surface of connecting seat, the location sand grip can slide in positioning groove. Make circumferential location between valve rod and the connecting seat through location sand grip and positioning groove, make the valve rod oscilaltion stable in the connecting seat to it is stable to make the temperature control effect of temperature-sensing head to the temperature-sensing valve.

In the temperature control head, the upper end of the positioning cylinder is provided with an inward protrusion, the lower end of the spring sleeve is provided with an outward protrusion, the lower end of the spring sleeve is inserted into the positioning cylinder, and the outward protrusion is positioned below the inward protrusion and abuts against the inward protrusion. The spring, the spring sleeve and the valve rod can be assembled into an assembly through the inner protrusion and the outer protrusion, modular production is facilitated, and the temperature control head is convenient to assemble.

In the temperature control head, the outer protrusion is provided with a positioning bump, the positioning cylinder is provided with a sliding groove along the axial direction, and the positioning bump is embedded into the sliding groove and can slide in the sliding groove. The sliding groove and the positioning lug enable the spring sleeve to be circumferentially positioned with the valve rod, the valve rod is circumferentially positioned on the connecting seat through the positioning groove and the positioning convex strip, and therefore the spring sleeve is circumferentially positioned with the connecting seat, the spring sleeve is prevented from rotating when the temperature control head works, and the temperature control effect of the temperature control head on the temperature control valve is stable.

Compared with the prior art, the utility model has the advantages of it is following:

1. set up the sticking department on the connecting seat, set up the locking hole on the sticking department, set up the locking groove that several and locking hole correspond on the governing valve lid, the locking inserted bar can insert in the locking hole and the upper end of locking inserted bar can be gone into to lock the inslot and fix from the below of sticking department to make the first regulation valve gap of temperature control and connecting seat can lock.

2. Be provided with on the lateral surface of adjusting valve gap and lock the setting for temperature scale mark of groove one-to-one, be provided with the pointer that is located the adjusting valve gap outside on the sticking department, when the pointer is relative with a certain setting for temperature scale mark, the locking hole is relative with the locking groove that should set for temperature scale mark and correspond to make things convenient for going on of locking operation.

3. The locking part is also provided with a reinforcing part, the reinforcing part is provided with a clamping groove, and the inner side part of the locking inserted bar is clamped into the clamping groove, so that the locking inserted bar is stably fixed on the temperature control head.

4. The spring sleeve is sleeved outside the spring, and the valve rod is circumferentially positioned through the positioning groove and the positioning convex strip, so that the temperature control of the temperature control head is stable.

5. The valve rod, the spring and the spring sleeve form an assembly, so that modular production is facilitated, and the temperature control head is convenient to assemble.

Drawings

FIG. 1 is a perspective view of the present thermal head when locked;

FIG. 2 is a longitudinal cross-sectional view of the present thermal head when locked;

FIG. 3 is a cross-sectional view taken along line A-A of FIG. 2;

FIG. 4 is a perspective view of an adjustment valve cover in the present temperature control head;

FIG. 5 is a disassembled perspective view of the connecting seat and the locking inserted link in the temperature control head;

fig. 6 is a disassembled perspective view of the spring, the spring sleeve and the valve rod in the temperature control head.

In the figure, 1, a connecting seat; 1a, positioning convex strips; 1b, a locking part; 1b1, locking hole; 1c, a pointer; 1d, a reinforcement part; 1d1, card slot; 2. adjusting the valve cover; 2a, locking grooves; 2b, setting temperature scale marks; 2c, a limiting block; 3. a thermal bulb; 4. a valve stem; 4a, a positioning cylinder; 4a1, positioning groove; 4a2, inner protrusion; 4a3, a chute; 5. a spring; 6. a spring sleeve; 6a, closing a plate; 6b, an outer bulge; 6c, positioning a bump; 7. locking the inserted rod; 7a, lugs.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

Example one

As shown in fig. 1-6, a temperature control head comprises a connecting base 1, an adjusting valve cover 2 is connected to the upper end of the connecting base 1 through a thread, a thermal bulb 3 is fixed in the adjusting valve cover 2, a valve rod 4 is inserted into the connecting base 1, and a spring 5 is arranged between the valve rod 4 and the thermal bulb 3. Spring 5 suit is outside valve rod 4, and spring 5's outside suit has spring sleeve 6, and the upper end of spring sleeve 6 supports and leans on thermal bulb 3. The upper port of the spring sleeve 6 is provided with a sealing plate 6a, the upper end of the spring 5 is propped against the sealing plate 6a, and the lower end of the spring 5 is propped against the lower end of the valve rod 4. The lower extreme of valve rod 4 is fixed with the cover and establishes the location section of thick bamboo 4a outside valve rod 4, has along axially extended positioning groove 4a1 on the lateral surface of location section of thick bamboo 4a, has the location sand grip 1a of embedding in positioning groove 4a1 on the medial surface of connecting seat 1, and location sand grip 1a can slide in positioning groove 4a 1. The four positioning grooves 4a1 are uniformly distributed in the circumferential direction, and the four positioning ribs 1a are provided in one-to-one correspondence with the positioning grooves 4a 1. The positioning tube 4a has an inward protrusion 4a2 on the upper end, the spring sleeve 6 has an outward protrusion 6b on the lower end, the lower end of the spring sleeve 6 is inserted into the positioning tube 4a, and the outer protrusion 6b is located below the inner protrusion 4a2 and abuts against the inner protrusion 4a 2. The outer bulge 6b is provided with a positioning lug 6c, the positioning cylinder 4a is axially provided with a sliding groove 4a3, the upper end of the sliding groove 4a3 is opened, and the positioning lug 6c is embedded into the sliding groove 4a3 and can slide in the sliding groove 4a 3. The four sliding grooves 4a3 are uniformly distributed along the circumferential direction, the sliding grooves 4a3 and the positioning grooves 4a1 are arranged on the positioning cylinder 4a in a staggered mode, and the positioning lugs 6c correspond to the sliding grooves 4a3 one by one. The number of the positioning grooves 4a1 and the sliding grooves 4a3 can be increased or decreased appropriately, and the positions of the positioning grooves 4a1 and the sliding grooves 4a3 need to be staggered at different circumferential angles of the positioning cylinder 4 a. The lower end of the connecting seat 1 is fixedly connected to a valve body of the temperature control valve, the lower end of the valve rod 4 is connected with a valve core of the temperature control valve, when the valve core is abutted against the valve rod 4, the valve rod 4 moves upwards, the spring 5 is compressed properly, and the outer protrusion 6b is separated from the inner protrusion 4a 2.

The outer side surface of the connecting seat 1 is provided with a convex locking part 1b, the locking part 1b is positioned below the adjusting valve cover 2, and the locking part 1b is provided with a locking hole 1b1 which penetrates through the locking part 1b up and down. The inner side surface of the lower end of the adjusting valve cover 2 is provided with a locking groove 2a corresponding to the locking hole 1b1, the lower end of the locking groove 2a is opened, and the locking groove 2a is provided with a plurality of grooves and is sequentially arranged along the circumferential direction. The outer side surface of the lower end of the adjusting valve cover 2 is provided with a plurality of temperature scale marks 2b which are arranged in sequence along the circumferential direction, and the temperature scale marks 2b are arranged corresponding to the locking grooves 2a one by one. The number of the set temperature scale markings 2b and the locking grooves 2a is set according to actual needs. The locking part 1b has a pointer 1c protruded upward on an outer end thereof, the pointer 1c being located outside the regulator valve cap 2, and the locking groove 2a corresponding to one of the set temperature scale marks 2b is opposed to the locking hole 1b1 when the pointer 1c is opposed to the set temperature scale mark 2 b.

The temperature control head further comprises a locking plunger 7, the locking plunger 7 can be inserted into the locking hole 1b1 from the lower end of the locking portion 1b, and the upper end of the locking plunger 7 can be snapped into any one of the locking grooves 2a and fixed. The lock plunger 7 has a lug 7a on a side of a lower end thereof, and the lug 7a can abut on a lower end surface of the lock portion 1b when the lock plunger 7 is inserted into the lock hole 1b 1. The lugs 7a are two and symmetrically arranged. The outer side surface of the connecting seat 1 is also provided with a convex reinforcing part 1d, the locking part 1b is integrally fixed on the lower end of the reinforcing part 1d, the outer side surface of the reinforcing part 1d is provided with a clamping groove 1d1 communicated with the locking hole 1b1, and the upper end of the clamping groove 1d1 is opened. When the lock plunger 7 is inserted into the lock hole 1b1 and the upper end of the lock plunger 7 is engaged with and fixed to the lock groove 2a, the inner side portion of the lock plunger 7 is engaged with the engaging groove 1d 1. The reinforcing part 1d has a limiting effect, a limiting block 2c is further fixed on the inner side surface of the lower end of the adjusting valve cover 2, and the limiting block 2c can abut against the reinforcing part 1d in the rotating process of the adjusting valve cover 2; also, when the lock plunger 7 is not inserted into the lock hole 1b1 but merely snapped into the lock groove 2a to be fixed, the inner side portion of the lock plunger 7 can be stopped by the reinforcement portion 1d during the rotation of the adjustment bonnet 2, thereby rotating the adjustment bonnet 2 within the range of the stopper 2c to the lock plunger 7.

The locking inserted bar 7 is a cuboid or a T-shaped column, the section of the locking hole 1b1 is correspondingly rectangular or T-shaped, and circumferential positioning is formed when the locking inserted bar 7 is inserted into the locking hole 1b 1. The locking inserted bar 7 is made of plastics, the reinforcing part 1d is also made of plastics, when the inner side part of the locking inserted bar 7 is clamped into the clamping groove 1d1, the wall surfaces on two sides of the clamping groove 1d1 are tightly attached to two sides of the locking inserted bar 7 in a matching mode, when no external force acts, the locking inserted bar 7 is clamped in the clamping groove 1d1 and cannot fall out, and when the external force applied to the locking inserted bar 7 is larger than the friction resistance, the locking inserted bar 7 can be continuously inserted into the locking groove 2a or pulled out of the clamping groove 1d 1; or a spring piece which protrudes from the middle is arranged on one side wall surface of the clamping groove 1d1, and when the lock inserted bar 7 is clamped into the clamping groove 1d1, the spring piece and the other side wall surface of the clamping groove 1d1 clamp and fix the lock inserted bar 7. When the upper end of the locking inserted bar 7 is clamped into the locking groove 2a, the wall surfaces on two sides of the locking groove 2a are tightly attached to two sides of the locking inserted bar 7 to form fixation, the locking inserted bar 7 is made of plastics, the adjusting valve cover 2 is also made of plastics, when no external force is applied, the locking inserted bar 7 is clamped in the locking groove 2a and cannot fall out, and when the external force applied to the locking inserted bar 7 is greater than the friction resistance, the locking inserted bar 7 can be inserted into the locking groove 2a or pulled out of the locking groove 2 a; or install middle convex spring leaf in the middle of locking groove 2 a's a lateral wall face, correspond on the locking inserted bar 7 and be provided with the little caulking groove that the middle bulge of feed spring leaf imbeds, when the upper end of locking inserted bar 7 was embedded into locking groove 2a, the spring leaf was pressed from both sides locking inserted bar 7 with the opposite side wall face of locking groove 2a tightly, and the bulge was embedded into little caulking groove in the middle of the spring leaf.

When the temperature adjusting valve cover is used, the adjusting valve cover 2 is rotated to enable the pointer 1c to be aligned with the required set temperature scale mark 2b, the locking hole 1b1 of the locking part 1b is opposite to the locking groove 2a corresponding to the set temperature scale mark 2b, then the locking inserted rod 7 is inserted into the locking hole 1b1 from the lower end of the locking part 1b, the inner side part of the locking inserted rod 7 is clamped into the clamping groove 1d1, and the upper end of the locking inserted rod 7 is clamped into the locking groove 2a opposite to the locking hole 1b1 and fixed, and therefore the adjusting valve cover 2 and the connecting seat 1 are locked in the circumferential direction. Therefore, the temperature control head adjusting valve cover 2 and the connecting seat 1 can be locked. When the locking inserted bar 7 needs to be taken out and unlocked, the lower end of the locking inserted bar 7 can be used as a force application point, and the locking inserted bar 7 can be pulled out downwards by force. If the locking plug 7 cannot be pulled out with fingers, the locking plug 7 can be pulled out from the locking portion 1b by using a tool such as nipper pliers as long as the force applied to the locking plug 7 is larger than the resistance force generated after the locking plug 7 is fixed.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims

1. The utility model provides a temperature control head, includes connecting seat (1), the upper end threaded connection of connecting seat (1) has regulation valve gap (2), regulation valve gap (2) internal fixation has temperature bulb (3), connecting seat (1) interpolation is equipped with valve rod (4), be provided with spring (5) between valve rod (4) and temperature bulb (3), its characterized in that, convex sticking department (1b) has on the lateral surface of connecting seat (1), sticking department (1b) is located the below of adjusting valve gap (2), locking hole (1b1) that run through from top to bottom has on sticking department (1b), set up locking groove (2a) that correspond the setting with locking hole (1b1) on the medial surface of regulation valve gap (2) lower extreme, locking groove (2a) have the several and arrange along circumference in proper order, the temperature control head further comprises a locking inserted rod (7), the locking inserted rod (7) can be inserted into the locking hole (1b1) from the lower end of the locking part (1b), and the upper end of the locking inserted rod (7) can be clamped into any one locking groove (2a) and fixed.

2. The temperature control head according to claim 1, wherein the locking part (1b) has an upward protruding pointer (1c) on the outer end thereof, the pointer (1c) is located on the outer side of the adjusting valve cover (2), a plurality of temperature setting scale marks (2b) are arranged on the outer side surface of the lower end of the adjusting valve cover (2) in sequence along the circumferential direction, the temperature setting scale marks (2b) are arranged in one-to-one correspondence with the locking grooves (2a), and when the pointer (1c) is opposite to one of the temperature setting scale marks (2b), the locking groove (2a) corresponding to the temperature setting scale mark (2b) is opposite to the locking hole (1b 1).

3. Temperature control head according to claim 1 or 2, characterized in that the lower end of the lock plunger (7) has a lug (7a) on a side surface thereof, which lug (7a) can abut against the lower end surface of the lock portion (1b) when the lock plunger (7) is inserted into the lock hole (1b 1).

4. The temperature control head according to claim 1 or 2, wherein the outer side surface of the connecting base (1) is further provided with a protruding reinforcing part (1d), the locking part (1b) is integrally fixed on the lower end of the reinforcing part (1d), the outer side surface of the reinforcing part (1d) is provided with a clamping groove (1d1) communicated with the locking hole (1b1), the upper end of the clamping groove (1d1) is opened, and the inner side part of the locking inserted rod (7) can be clamped into the clamping groove (1d 1).

5. The temperature control head according to claim 4, characterized in that a limiting block (2c) is further fixed on the inner side surface of the lower end of the adjusting valve cover (2), and the limiting block (2c) can abut against the reinforcing part (1d) in the rotating process of the adjusting valve cover (2).

6. The temperature control head according to claim 1 or 2, wherein the spring (5) is sleeved outside the valve rod (4), a spring sleeve (6) is sleeved outside the spring (5), the upper end of the spring sleeve (6) abuts against the temperature bulb (3), a sealing plate (6a) is arranged at the upper port of the spring sleeve (6), the upper end of the spring (5) abuts against the sealing plate (6a), and the lower end of the spring (5) abuts against the lower end of the valve rod (4).

7. The temperature control head according to claim 6, wherein a positioning cylinder (4a) sleeved outside the valve rod (4) is fixed at the lower end of the valve rod (4), a positioning groove (4a1) extending along the axial direction is formed in the outer side surface of the positioning cylinder (4a), a positioning convex strip (1a) embedded into the positioning groove (4a1) is formed in the inner side surface of the connecting base (1), and the positioning convex strip (1a) can slide in the positioning groove (4a 1).

8. Temperature control head according to claim 7, characterized in that the positioning cylinder (4a) has an inwardly projecting inner protrusion (4a2) on its upper end and the spring sleeve (6) has an outwardly projecting outer protrusion (6b) on its lower end, the lower end of the spring sleeve (6) being inserted into the positioning cylinder (4a), the outer protrusion (6b) being located below the inner protrusion (4a2) and resting on the inner protrusion (4a 2).

9. The temperature control head according to claim 8, wherein the outer protrusion (6b) has a positioning protrusion (6c), the positioning barrel (4a) has a sliding slot (4a3) along the axial direction, and the positioning protrusion (6c) is inserted into the sliding slot (4a3) and can slide in the sliding slot (4a 3).